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Номер 18, страница 112, часть 2 - гдз по алгебре 10 класс учебник Пак, Ардакулы
Авторы: Пак О. В., Ардакулы Д., Ескендирова Е. В.
Тип: Учебник
Издательство: Алматыкітап баспасы
Год издания: 2019 - 2026
Часть: 2
ISBN: 978-601-01-3958-9
Рекомендовано Министерством образования и науки Республики Казахстан
Популярные ГДЗ в 10 классе
Часть 2. Глава 6. Применение производной. Параграф 4. Задачи на нахождение экстремумов. Задачи - номер 18, страница 112.
App\Models\Task {#1030 // resources/views/models/task/default.blade.php #connection: "mysql" #table: "tasks" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1120417 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "112" "field_page_end" => null "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik/6-4zad-18" "field_display_title" => "18" "field_outside_task" => null "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037 #items: array:1 [ 0 => App\Models\Term {#1036 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #original: array:6 [ "id" => 26 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "номер" "field_cases" => array:6 [ "field_accusative_case" => "номер" "field_creative_case" => "номером" "field_dative_case" => "номеру" "field_genitive_case" => "номера" "field_nominative_case" => "номер" "field_prepositional_case" => "номере" ] "field_short_name" => "№" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_match" => null "breadcrumbs" => [] "edition_groups" => Illuminate\Database\Eloquent\Collection {#1035 #items: [] #escapeWhenCastingToString: false } "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1072 #items: array:1 [ 0 => App\Models\Branch {#1034 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1119426 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => null "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1039 #items: array:1 [ 0 => App\Models\Term {#1038 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 31 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Часть" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => "1" "field_short_name" => "ч." ] #original: array:7 [ "id" => 31 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Часть" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => "1" "field_short_name" => "ч." ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_page_start" => "5" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1040 #items: array:1 [ 0 => App\Models\Book {#1041 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1042 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1044 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1046 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1048 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1052 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1053 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1055 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1057 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1059 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1060 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1061 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1062 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1063 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1064 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1065 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1066 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1067 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1068 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #original: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1042 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1044 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1046 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1048 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1052 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1053 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1055 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1057 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1059 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1060 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1061 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1062 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1063 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1064 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1065 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1066 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1067 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1068 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1069 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 1119426 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => null "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1039} "field_page_start" => "5" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1040} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1069} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "parent_branches" => Illuminate\Database\Eloquent\Collection {#1260 #items: array:4 [ 0 => App\Models\Branch {#1070 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1119426 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => null "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1073 #items: array:1 [ 0 => App\Models\Term {#1071 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 31 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Часть" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => "1" "field_short_name" => "ч." ] #original: array:7 [ "id" => 31 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Часть" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => "1" "field_short_name" => "ч." ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_page_start" => "5" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1074 #items: array:1 [ 0 => App\Models\Book {#1075 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1076 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1078 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1080 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1082 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1086 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1087 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1091 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1093 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1094 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1095 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1096 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1097 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1098 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1099 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1100 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1101 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1102 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #original: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1076 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1078 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1080 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1082 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1086 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1087 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1089 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1091 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1093 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1094 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1095 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1096 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1097 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1098 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1099 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1100 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1101 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1102 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1103 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 1119426 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => null "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1073} "field_page_start" => "5" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1074} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1103} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Branch {#1104 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1119442 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Применение производной" "field_branch_order" => "6" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1105 #items: array:1 [ 0 => App\Models\Term {#1106 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => null ] #original: array:7 [ "id" => 29 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Глава" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => null ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_page_start" => "76" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1107 #items: array:1 [ 0 => App\Models\Book {#1108 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1109 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1111 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1113 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1115 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1119 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1120 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1122 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1124 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1126 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1127 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1128 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1129 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1130 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1131 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1132 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1133 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1134 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1135 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #original: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1109 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1111 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1113 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1115 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1119 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1120 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1122 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1124 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1126 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1127 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1128 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1129 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1130 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1131 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1132 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1133 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1134 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1135 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1136 #items: array:1 [ 0 => App\Models\Branch {#1137 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1119426 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => null "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1138 …2} "field_page_start" => "5" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1140 …2} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141 …2} ] #original: array:24 [ "id" => 1119426 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => null "field_branch_order" => "2" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1138 …2} "field_page_start" => "5" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1140 …2} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141 …2} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 1119442 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Применение производной" "field_branch_order" => "6" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1105} "field_page_start" => "76" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1107} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1136} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Branch {#1142 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1119450 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Задачи на нахождение экстремумов" "field_branch_order" => "4" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1143 #items: array:1 [ 0 => App\Models\Term {#1144 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 32 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Параграф" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => "§" ] #original: array:7 [ "id" => 32 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "name" => "Параграф" "field_cases" => array:6 [ …6] "field_page_check_not_needed" => null "field_short_name" => "§" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "field_page_start" => "105" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1145 #items: array:1 [ 0 => App\Models\Book {#1146 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1147 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1149 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1151 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1153 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1157 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1158 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1160 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1162 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1164 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1165 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1166 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1167 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1168 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1169 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1170 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1171 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1172 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1173 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #original: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1147 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1149 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1151 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1153 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1157 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1158 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1160 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1162 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1164 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1165 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1166 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1167 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1168 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1169 …2} "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ …1] "field_cover_alts" => array:1 [ …1] "field_covers" => array:1 [ …1] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1170 …2} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1171 …2} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1172 …2} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1173 …2} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ …3] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1174 #items: array:1 [ 0 => App\Models\Branch {#1175 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1119442 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Применение производной" "field_branch_order" => "6" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1176 …2} "field_page_start" => "76" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1178 …2} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1179 …2} ] #original: array:24 [ "id" => 1119442 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Применение производной" "field_branch_order" => "6" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1176 …2} "field_page_start" => "76" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1178 …2} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1179 …2} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 1119450 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Задачи на нахождение экстремумов" "field_branch_order" => "4" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1143} "field_page_start" => "105" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1145} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1174} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 3 => App\Models\Branch {#1185 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ "id" => 1119452 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Задачи" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1186 #items: [] #escapeWhenCastingToString: false } "field_page_start" => "110" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1187 #items: array:1 [ 0 => App\Models\Book {#1188 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1189 …2} "field_class" => Illuminate\Database\Eloquent\Collection {#1191 …2} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1193 …2} "field_author" => Illuminate\Database\Eloquent\Collection {#1195 …2} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1199 …2} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1200 …2} "field_country" => Illuminate\Database\Eloquent\Collection {#1202 …2} "field_city" => Illuminate\Database\Eloquent\Collection {#1204 …2} "field_series" => Illuminate\Database\Eloquent\Collection {#1206 …2} "field_umk" => Illuminate\Database\Eloquent\Collection {#1207 …2} "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1208 …2} "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1209 …2} "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1210 …2} "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1211 …2} "field_under_the_edition_degree" => null "field_cover_description" => null …28 ] #original: array:50 [ …50] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "branch_parent" => Illuminate\Database\Eloquent\Collection {#1216 #items: array:1 [ 0 => App\Models\Branch {#1217 #connection: "mysql" #table: "branches" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:24 [ …24] #original: array:24 [ …24] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 1119452 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Задачи" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1186} "field_page_start" => "110" "field_branch_display" => "0" "field_branch_expanded" => "0" "field_display_branch_in_title" => "1" "field_display_task_interval" => "0" "field_display_branch_page" => "1" "field_branch_title_in_content" => "0" "field_navigation_title" => null "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "field_branch_cover" => [] "field_branch_covers" => [] "book" => Illuminate\Database\Eloquent\Collection {#1187} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1216} ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1261 #items: array:2 [ 0 => App\Models\Element {#1271 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:7 [ "id" => 1301102 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1280 #items: array:1 [ 0 => App\Models\Edition {#1272 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "1120417" "type" => "task" ] "text" => "<p><strong>18.</strong> <strong>(4) a)</strong> В двух различных сосудах находятся растворы соли, причем в первом находится 10 кг, а во втором 15 кг. При испарении воды содержание соли в первом сосуде увеличилось в $p$ раз, а во втором в $q$ раз. Известно, что $pq=6$. Какая наименьшая суммарная масса растворов могла остаться в обоих сосудах?</p><p><strong>(4) б)</strong> решить задачу пункта а) при условии, что в первом сосуде находится первоначально $m_1$ кг, во втором $m_2$ кг, $pq=c$, где $m_1$, $m_2$ и $c$ – данные положительные числа, $y=x^2$.</p>" "img" => array:1 [ 0 => array:5 [ "name" => "18-1.jpg" "alt" => null "width" => "1701" "height" => 490 "path" => "/media/algebra_10/baspasy-u19/0-6-4zad/18-1.webp?ts=1753534932" ] ] ] #original: array:7 [ "id" => 1301102 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1280} "task" => array:2 [ "refs" => "1120417" "type" => "task" ] "text" => "<p><strong>18.</strong> <strong>(4) a)</strong> В двух различных сосудах находятся растворы соли, причем в первом находится 10 кг, а во втором 15 кг. При испарении воды содержание соли в первом сосуде увеличилось в $p$ раз, а во втором в $q$ раз. Известно, что $pq=6$. Какая наименьшая суммарная масса растворов могла остаться в обоих сосудах?</p><p><strong>(4) б)</strong> решить задачу пункта а) при условии, что в первом сосуде находится первоначально $m_1$ кг, во втором $m_2$ кг, $pq=c$, где $m_1$, $m_2$ и $c$ – данные положительные числа, $y=x^2$.</p>" "img" => array:1 [ 0 => array:5 [ "name" => "18-1.jpg" "alt" => null "width" => "1701" "height" => 490 "path" => "/media/algebra_10/baspasy-u19/0-6-4zad/18-1.webp?ts=1753534932" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 1 => App\Models\Element {#1278 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ "id" => 1552138 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1288 #items: array:1 [ 0 => App\Models\Edition {#1279 #connection: "mysql" #table: "editions" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ …21] #original: array:21 [ …21] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "task" => array:2 [ "refs" => "1120417" "type" => "task" ] "text" => "<p><strong>а)</strong>Обозначим начальные массы растворов в первом и втором сосудах как $m_{1и} = 10$ кг и $m_{2и} = 15$ кг соответственно. Пусть $s_1$ и $s_2$ — это массы соли в каждом сосуде, которые остаются неизменными в процессе испарения. Начальная концентрация в первом сосуде равна $C_{1и} = s_1/m_{1и}$, а во втором $C_{2и} = s_2/m_{2и}$.<br>После испарения воды конечные массы растворов стали $m_{1к}$ и $m_{2к}$, а конечные концентрации — $C_{1к} = s_1/m_{1к}$ и $C_{2к} = s_2/m_{2к}$.<br>По условию задачи, $C_{1к} = p \cdot C_{1и}$ и $C_{2к} = q \cdot C_{2и}$. Отсюда мы можем выразить конечные массы через начальные:<br>$s_1/m_{1к} = p \cdot (s_1/m_{1и}) \implies m_{1к} = m_{1и}/p = 10/p$.<br>$s_2/m_{2к} = q \cdot (s_2/m_{2и}) \implies m_{2к} = m_{2и}/q = 15/q$.<br>Суммарная масса растворов после испарения составляет $M = m_{1к} + m_{2к} = 10/p + 15/q$.<br>Нам дано, что $pq=6$, откуда можно выразить $q = 6/p$. Подставим это в формулу для суммарной массы:<br>$M(p) = 10/p + 15/(6/p) = 10/p + 15p/6 = 10/p + 2.5p$.<br>Поскольку концентрация увеличилась, то $p > 1$ и $q > 1$. Из $q=6/p > 1$ следует, что $p < 6$. Таким образом, мы ищем наименьшее значение функции $M(p)$ на интервале $p \in (1, 6)$.<br>Для нахождения минимума функции найдем ее производную по $p$:<br>$M'(p) = (10/p + 2.5p)' = -10/p^2 + 2.5$.<br>Приравняем производную к нулю: $-10/p^2 + 2.5 = 0 \implies 2.5 = 10/p^2 \implies p^2 = 10/2.5 = 4$.<br>Так как $p>1$, то $p=2$. Это значение попадает в наш интервал $(1, 6)$.<br>Чтобы убедиться, что это точка минимума, найдем вторую производную: $M''(p) = (-10p^{-2})' = 20p^{-3} = 20/p^3$. При $p=2$, $M''(2) = 20/8 > 0$, что подтверждает, что при $p=2$ функция достигает своего минимума.<br>Вычислим это минимальное значение:<br>$M_{min} = M(2) = 10/2 + 2.5 \cdot 2 = 5 + 5 = 10$ кг.<br>Ответ: 10 кг.</p><p><strong>б)</strong>Эта задача является обобщением пункта а). Пусть начальные массы равны $m_1$ и $m_2$, и известно, что $pq=c$.<br>Аналогично предыдущему пункту, конечные массы растворов равны $m_{1к} = m_1/p$ и $m_{2к} = m_2/q$.<br>Суммарная конечная масса $M = m_1/p + m_2/q$. Используя соотношение $q=c/p$, получаем функцию суммарной массы от одной переменной $p$:<br>$M(p) = m_1/p + m_2/(c/p) = m_1/p + \frac{m_2}{c}p$.<br>Из условия, что концентрации увеличиваются, следует $p \ge 1$ и $q \ge 1$. Из $q = c/p \ge 1$ получаем $p \le c$. Таким образом, необходимо найти наименьшее значение функции $M(p)$ на отрезке $[1, c]$.<br>Найдем производную функции $M(p)$:<br>$M'(p) = -m_1/p^2 + m_2/c$.<br>Приравняв производную к нулю, найдем стационарную точку: $m_2/c = m_1/p^2 \implies p^2 = \frac{m_1 c}{m_2} \implies p_0 = \sqrt{\frac{m_1 c}{m_2}}$.<br>Вторая производная $M''(p) = 2m_1/p^3$ положительна для $p>0$ (так как $m_1, c > 0$), следовательно, $p_0$ является точкой минимума функции $M(p)$ на всей области определения $p>0$.<br>Наименьшее значение функции на отрезке $[1, c]$ зависит от того, где находится точка $p_0$ по отношению к этому отрезку. Рассмотрим три случая:<br>1. Точка минимума $p_0$ находится на отрезке $[1, c]$, то есть $1 \le \sqrt{\frac{m_1 c}{m_2}} \le c$. Это условие эквивалентно $\frac{m_2}{c} \le m_1 \le m_2 c$. В этом случае наименьшее значение функции на отрезке совпадает с ее значением в точке минимума:<br>$M_{min} = M(p_0) = m_1/\sqrt{\frac{m_1 c}{m_2}} + \frac{m_2}{c}\sqrt{\frac{m_1 c}{m_2}} = \sqrt{\frac{m_1 m_2}{c}} + \sqrt{\frac{m_1 m_2}{c}} = 2\sqrt{\frac{m_1 m_2}{c}}$.<br>2. Точка минимума $p_0$ находится левее отрезка $[1, c]$, то есть $\sqrt{\frac{m_1 c}{m_2}} < 1$, что эквивалентно $m_1 < \frac{m_2}{c}$. В этом случае функция $M(p)$ возрастает на всем отрезке $[1, c]$, и ее наименьшее значение достигается на левой границе, при $p=1$.<br>$M_{min} = M(1) = m_1/1 + m_2/c = m_1 + m_2/c$.<br>3. Точка минимума $p_0$ находится правее отрезка $[1, c]$, то есть $\sqrt{\frac{m_1 c}{m_2}} > c$, что эквивалентно $m_1 > m_2 c$. В этом случае функция $M(p)$ убывает на всем отрезке $[1, c]$, и ее наименьшее значение достигается на правой границе, при $p=c$.<br>$M_{min} = M(c) = m_1/c + \frac{m_2}{c} \cdot c = m_1/c + m_2$.<br>Ответ: Наименьшая суммарная масса растворов равна:<br>$2\sqrt{\frac{m_1 m_2}{c}}$, если $\frac{m_2}{c} \le m_1 \le m_2 c$;<br>$m_1 + \frac{m_2}{c}$, если $m_1 < \frac{m_2}{c}$;<br>$\frac{m_1}{c} + m_2$, если $m_1 > m_2 c$.</p>" ] #original: array:6 [ "id" => 1552138 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1288} "task" => array:2 [ "refs" => "1120417" "type" => "task" ] "text" => "<p><strong>а)</strong>Обозначим начальные массы растворов в первом и втором сосудах как $m_{1и} = 10$ кг и $m_{2и} = 15$ кг соответственно. Пусть $s_1$ и $s_2$ — это массы соли в каждом сосуде, которые остаются неизменными в процессе испарения. Начальная концентрация в первом сосуде равна $C_{1и} = s_1/m_{1и}$, а во втором $C_{2и} = s_2/m_{2и}$.<br>После испарения воды конечные массы растворов стали $m_{1к}$ и $m_{2к}$, а конечные концентрации — $C_{1к} = s_1/m_{1к}$ и $C_{2к} = s_2/m_{2к}$.<br>По условию задачи, $C_{1к} = p \cdot C_{1и}$ и $C_{2к} = q \cdot C_{2и}$. Отсюда мы можем выразить конечные массы через начальные:<br>$s_1/m_{1к} = p \cdot (s_1/m_{1и}) \implies m_{1к} = m_{1и}/p = 10/p$.<br>$s_2/m_{2к} = q \cdot (s_2/m_{2и}) \implies m_{2к} = m_{2и}/q = 15/q$.<br>Суммарная масса растворов после испарения составляет $M = m_{1к} + m_{2к} = 10/p + 15/q$.<br>Нам дано, что $pq=6$, откуда можно выразить $q = 6/p$. Подставим это в формулу для суммарной массы:<br>$M(p) = 10/p + 15/(6/p) = 10/p + 15p/6 = 10/p + 2.5p$.<br>Поскольку концентрация увеличилась, то $p > 1$ и $q > 1$. Из $q=6/p > 1$ следует, что $p < 6$. Таким образом, мы ищем наименьшее значение функции $M(p)$ на интервале $p \in (1, 6)$.<br>Для нахождения минимума функции найдем ее производную по $p$:<br>$M'(p) = (10/p + 2.5p)' = -10/p^2 + 2.5$.<br>Приравняем производную к нулю: $-10/p^2 + 2.5 = 0 \implies 2.5 = 10/p^2 \implies p^2 = 10/2.5 = 4$.<br>Так как $p>1$, то $p=2$. Это значение попадает в наш интервал $(1, 6)$.<br>Чтобы убедиться, что это точка минимума, найдем вторую производную: $M''(p) = (-10p^{-2})' = 20p^{-3} = 20/p^3$. При $p=2$, $M''(2) = 20/8 > 0$, что подтверждает, что при $p=2$ функция достигает своего минимума.<br>Вычислим это минимальное значение:<br>$M_{min} = M(2) = 10/2 + 2.5 \cdot 2 = 5 + 5 = 10$ кг.<br>Ответ: 10 кг.</p><p><strong>б)</strong>Эта задача является обобщением пункта а). Пусть начальные массы равны $m_1$ и $m_2$, и известно, что $pq=c$.<br>Аналогично предыдущему пункту, конечные массы растворов равны $m_{1к} = m_1/p$ и $m_{2к} = m_2/q$.<br>Суммарная конечная масса $M = m_1/p + m_2/q$. Используя соотношение $q=c/p$, получаем функцию суммарной массы от одной переменной $p$:<br>$M(p) = m_1/p + m_2/(c/p) = m_1/p + \frac{m_2}{c}p$.<br>Из условия, что концентрации увеличиваются, следует $p \ge 1$ и $q \ge 1$. Из $q = c/p \ge 1$ получаем $p \le c$. Таким образом, необходимо найти наименьшее значение функции $M(p)$ на отрезке $[1, c]$.<br>Найдем производную функции $M(p)$:<br>$M'(p) = -m_1/p^2 + m_2/c$.<br>Приравняв производную к нулю, найдем стационарную точку: $m_2/c = m_1/p^2 \implies p^2 = \frac{m_1 c}{m_2} \implies p_0 = \sqrt{\frac{m_1 c}{m_2}}$.<br>Вторая производная $M''(p) = 2m_1/p^3$ положительна для $p>0$ (так как $m_1, c > 0$), следовательно, $p_0$ является точкой минимума функции $M(p)$ на всей области определения $p>0$.<br>Наименьшее значение функции на отрезке $[1, c]$ зависит от того, где находится точка $p_0$ по отношению к этому отрезку. Рассмотрим три случая:<br>1. Точка минимума $p_0$ находится на отрезке $[1, c]$, то есть $1 \le \sqrt{\frac{m_1 c}{m_2}} \le c$. Это условие эквивалентно $\frac{m_2}{c} \le m_1 \le m_2 c$. В этом случае наименьшее значение функции на отрезке совпадает с ее значением в точке минимума:<br>$M_{min} = M(p_0) = m_1/\sqrt{\frac{m_1 c}{m_2}} + \frac{m_2}{c}\sqrt{\frac{m_1 c}{m_2}} = \sqrt{\frac{m_1 m_2}{c}} + \sqrt{\frac{m_1 m_2}{c}} = 2\sqrt{\frac{m_1 m_2}{c}}$.<br>2. Точка минимума $p_0$ находится левее отрезка $[1, c]$, то есть $\sqrt{\frac{m_1 c}{m_2}} < 1$, что эквивалентно $m_1 < \frac{m_2}{c}$. В этом случае функция $M(p)$ возрастает на всем отрезке $[1, c]$, и ее наименьшее значение достигается на левой границе, при $p=1$.<br>$M_{min} = M(1) = m_1/1 + m_2/c = m_1 + m_2/c$.<br>3. Точка минимума $p_0$ находится правее отрезка $[1, c]$, то есть $\sqrt{\frac{m_1 c}{m_2}} > c$, что эквивалентно $m_1 > m_2 c$. В этом случае функция $M(p)$ убывает на всем отрезке $[1, c]$, и ее наименьшее значение достигается на правой границе, при $p=c$.<br>$M_{min} = M(c) = m_1/c + \frac{m_2}{c} \cdot c = m_1/c + m_2$.<br>Ответ: Наименьшая суммарная масса растворов равна:<br>$2\sqrt{\frac{m_1 m_2}{c}}$, если $\frac{m_2}{c} \le m_1 \le m_2 c$;<br>$m_1 + \frac{m_2}{c}$, если $m_1 < \frac{m_2}{c}$;<br>$\frac{m_1}{c} + m_2$, если $m_1 > m_2 c$.</p>" ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "next" => array:2 [ "refs" => "1120418" "type" => "task" ] "previous" => array:2 [ "refs" => "1120416" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1309 #items: array:1 [ 0 => App\Models\Book {#1268 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1262 #items: array:1 [ 0 => App\Models\Term {#1263 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ …10] #original: array:10 [ …10] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_class" => Illuminate\Database\Eloquent\Collection {#1270 #items: array:1 [ 0 => App\Models\Term {#1266 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_publisher" => Illuminate\Database\Eloquent\Collection {#1264 #items: array:1 [ 0 => App\Models\Term {#1267 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_author" => Illuminate\Database\Eloquent\Collection {#1265 #items: array:3 [ 0 => App\Models\Term {#1286 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 1 => App\Models\Term {#1287 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } 2 => App\Models\Term {#1289 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:12 [ …12] #original: array:12 [ …12] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1290 #items: [] #escapeWhenCastingToString: false } "field_book_type" => Illuminate\Database\Eloquent\Collection {#1291 #items: array:1 [ 0 => App\Models\Term {#1292 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:10 [ …10] #original: array:10 [ …10] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_country" => Illuminate\Database\Eloquent\Collection {#1293 #items: array:1 [ 0 => App\Models\Term {#1294 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_city" => Illuminate\Database\Eloquent\Collection {#1295 #items: array:1 [ 0 => App\Models\Term {#1296 #connection: "mysql" #table: "terms" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ …1] } ] #escapeWhenCastingToString: false } "field_series" => Illuminate\Database\Eloquent\Collection {#1297 #items: [] #escapeWhenCastingToString: false } "field_umk" => Illuminate\Database\Eloquent\Collection {#1298 #items: [] #escapeWhenCastingToString: false } "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1299 #items: [] #escapeWhenCastingToString: false } "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1300 #items: [] #escapeWhenCastingToString: false } "field_publication_number" => null "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1301 #items: [] #escapeWhenCastingToString: false } "field_under_the_edition" => Illuminate\Database\Eloquent\Collection {#1302 #items: [] #escapeWhenCastingToString: false } "field_under_the_edition_degree" => null "field_cover_description" => null "field_publication_year" => "2019" "field_publication_year_until" => null "field_part" => "1, 2" "field_part_writing" => "Часть" "field_second_foreign_language" => null "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления" "field_allowed" => "Рекомендовано Министерством образования и науки Республики Казахстан" "field_reserve_field" => null "field_link_to_source" => null "field_tasks_count" => "1063" "field_priority" => "6" "field_default_folder" => "/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ 0 => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865" "alt" => "" "width" => "1940" "height" => "2895" ] ] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1303 #items: [] #escapeWhenCastingToString: false } "field_new_book" => Illuminate\Database\Eloquent\Collection {#1304 #items: [] #escapeWhenCastingToString: false } "field_old_book" => Illuminate\Database\Eloquent\Collection {#1305 #items: [] #escapeWhenCastingToString: false } "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1306 #items: [] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ "class" => 381 "subject" => 542 "class_subject" => 387 ] ] #original: array:50 [ "id" => 4295 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_tree_default_status" => "tasks" "field_pages_status" => null "field_subject" => Illuminate\Database\Eloquent\Collection {#1262} "field_class" => Illuminate\Database\Eloquent\Collection {#1270} "field_publisher" => Illuminate\Database\Eloquent\Collection {#1264} "field_author" => Illuminate\Database\Eloquent\Collection {#1265} "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1290} "field_book_type" => Illuminate\Database\Eloquent\Collection {#1291} "field_country" => Illuminate\Database\Eloquent\Collection {#1293} "field_city" => Illuminate\Database\Eloquent\Collection {#1295} "field_series" => Illuminate\Database\Eloquent\Collection {#1297} "field_umk" => 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"/algebra_10/baspasy-u19/" "field_isbn" => "978-601-01-3958-9" "field_cover" => array:1 [ 0 => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865" ] "field_cover_alts" => array:1 [ 0 => "" ] "field_covers" => array:1 [ 0 => array:4 [ "path" => "/media/algebra_10/baspasy-u19/covers/cover1.webp?ts=1752152865" "alt" => "" "width" => "1940" "height" => "2895" ] ] "field_popular_book" => null "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1303} "field_new_book" => Illuminate\Database\Eloquent\Collection {#1304} "field_old_book" => Illuminate\Database\Eloquent\Collection {#1305} "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik" "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1306} "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "breadcrumbs" => array:3 [ "class" => 381 "subject" => 542 "class_subject" => 387 ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } ] #escapeWhenCastingToString: false } "page" => Illuminate\Database\Eloquent\Collection {#1314 #items: array:1 [ 0 => App\Models\BookPage {#1313 #connection: "mysql" #table: "book_pages" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:21 [ "id" => 1099265 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "112" "field_url" => "/10-klass/algebra/baspasy-pak-uchebnik/page-2-112" "field_display_title" => "112" "field_folder" => "2" "field_image_name" => "112" "field_branch_parent" => Illuminate\Database\Eloquent\Collection {#1315 #items: array:1 [ 0 => App\Models\Branch {#1070} ] #escapeWhenCastingToString: false } "field_weight" => "0" "field_book_parent" => Illuminate\Database\Eloquent\Collection {#1316 #items: array:1 [ 0 => App\Models\Book {#1268} ] #escapeWhenCastingToString: false } "field_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => null "edition_groups" => Illuminate\Database\Eloquent\Collection {#1317 #items: [] #escapeWhenCastingToString: false } "content" => Illuminate\Database\Eloquent\Collection {#1327 #items: array:1 [ 0 => App\Models\Element {#1326 #connection: "mysql" #table: "elements" #primaryKey: "id" #keyType: "int" +incrementing: true #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false #attributes: array:6 [ …6] #original: array:6 [ …6] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] 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№18 (с. 112)
Условие. №18 (с. 112)
скриншот условия
18. (4) a) В двух различных сосудах находятся растворы соли, причем в первом находится 10 кг, а во втором 15 кг. При испарении воды содержание соли в первом сосуде увеличилось в $p$ раз, а во втором в $q$ раз. Известно, что $pq=6$. Какая наименьшая суммарная масса растворов могла остаться в обоих сосудах?
(4) б) решить задачу пункта а) при условии, что в первом сосуде находится первоначально $m_1$ кг, во втором $m_2$ кг, $pq=c$, где $m_1$, $m_2$ и $c$ – данные положительные числа, $y=x^2$.
Решение 2 (rus). №18 (с. 112)
а)Обозначим начальные массы растворов в первом и втором сосудах как $m_{1и} = 10$ кг и $m_{2и} = 15$ кг соответственно. Пусть $s_1$ и $s_2$ — это массы соли в каждом сосуде, которые остаются неизменными в процессе испарения. Начальная концентрация в первом сосуде равна $C_{1и} = s_1/m_{1и}$, а во втором $C_{2и} = s_2/m_{2и}$.
После испарения воды конечные массы растворов стали $m_{1к}$ и $m_{2к}$, а конечные концентрации — $C_{1к} = s_1/m_{1к}$ и $C_{2к} = s_2/m_{2к}$.
По условию задачи, $C_{1к} = p \cdot C_{1и}$ и $C_{2к} = q \cdot C_{2и}$. Отсюда мы можем выразить конечные массы через начальные:
$s_1/m_{1к} = p \cdot (s_1/m_{1и}) \implies m_{1к} = m_{1и}/p = 10/p$.
$s_2/m_{2к} = q \cdot (s_2/m_{2и}) \implies m_{2к} = m_{2и}/q = 15/q$.
Суммарная масса растворов после испарения составляет $M = m_{1к} + m_{2к} = 10/p + 15/q$.
Нам дано, что $pq=6$, откуда можно выразить $q = 6/p$. Подставим это в формулу для суммарной массы:
$M(p) = 10/p + 15/(6/p) = 10/p + 15p/6 = 10/p + 2.5p$.
Поскольку концентрация увеличилась, то $p > 1$ и $q > 1$. Из $q=6/p > 1$ следует, что $p < 6$. Таким образом, мы ищем наименьшее значение функции $M(p)$ на интервале $p \in (1, 6)$.
Для нахождения минимума функции найдем ее производную по $p$:
$M'(p) = (10/p + 2.5p)' = -10/p^2 + 2.5$.
Приравняем производную к нулю: $-10/p^2 + 2.5 = 0 \implies 2.5 = 10/p^2 \implies p^2 = 10/2.5 = 4$.
Так как $p>1$, то $p=2$. Это значение попадает в наш интервал $(1, 6)$.
Чтобы убедиться, что это точка минимума, найдем вторую производную: $M''(p) = (-10p^{-2})' = 20p^{-3} = 20/p^3$. При $p=2$, $M''(2) = 20/8 > 0$, что подтверждает, что при $p=2$ функция достигает своего минимума.
Вычислим это минимальное значение:
$M_{min} = M(2) = 10/2 + 2.5 \cdot 2 = 5 + 5 = 10$ кг.
Ответ: 10 кг.
б)Эта задача является обобщением пункта а). Пусть начальные массы равны $m_1$ и $m_2$, и известно, что $pq=c$.
Аналогично предыдущему пункту, конечные массы растворов равны $m_{1к} = m_1/p$ и $m_{2к} = m_2/q$.
Суммарная конечная масса $M = m_1/p + m_2/q$. Используя соотношение $q=c/p$, получаем функцию суммарной массы от одной переменной $p$:
$M(p) = m_1/p + m_2/(c/p) = m_1/p + \frac{m_2}{c}p$.
Из условия, что концентрации увеличиваются, следует $p \ge 1$ и $q \ge 1$. Из $q = c/p \ge 1$ получаем $p \le c$. Таким образом, необходимо найти наименьшее значение функции $M(p)$ на отрезке $[1, c]$.
Найдем производную функции $M(p)$:
$M'(p) = -m_1/p^2 + m_2/c$.
Приравняв производную к нулю, найдем стационарную точку: $m_2/c = m_1/p^2 \implies p^2 = \frac{m_1 c}{m_2} \implies p_0 = \sqrt{\frac{m_1 c}{m_2}}$.
Вторая производная $M''(p) = 2m_1/p^3$ положительна для $p>0$ (так как $m_1, c > 0$), следовательно, $p_0$ является точкой минимума функции $M(p)$ на всей области определения $p>0$.
Наименьшее значение функции на отрезке $[1, c]$ зависит от того, где находится точка $p_0$ по отношению к этому отрезку. Рассмотрим три случая:
1. Точка минимума $p_0$ находится на отрезке $[1, c]$, то есть $1 \le \sqrt{\frac{m_1 c}{m_2}} \le c$. Это условие эквивалентно $\frac{m_2}{c} \le m_1 \le m_2 c$. В этом случае наименьшее значение функции на отрезке совпадает с ее значением в точке минимума:
$M_{min} = M(p_0) = m_1/\sqrt{\frac{m_1 c}{m_2}} + \frac{m_2}{c}\sqrt{\frac{m_1 c}{m_2}} = \sqrt{\frac{m_1 m_2}{c}} + \sqrt{\frac{m_1 m_2}{c}} = 2\sqrt{\frac{m_1 m_2}{c}}$.
2. Точка минимума $p_0$ находится левее отрезка $[1, c]$, то есть $\sqrt{\frac{m_1 c}{m_2}} < 1$, что эквивалентно $m_1 < \frac{m_2}{c}$. В этом случае функция $M(p)$ возрастает на всем отрезке $[1, c]$, и ее наименьшее значение достигается на левой границе, при $p=1$.
$M_{min} = M(1) = m_1/1 + m_2/c = m_1 + m_2/c$.
3. Точка минимума $p_0$ находится правее отрезка $[1, c]$, то есть $\sqrt{\frac{m_1 c}{m_2}} > c$, что эквивалентно $m_1 > m_2 c$. В этом случае функция $M(p)$ убывает на всем отрезке $[1, c]$, и ее наименьшее значение достигается на правой границе, при $p=c$.
$M_{min} = M(c) = m_1/c + \frac{m_2}{c} \cdot c = m_1/c + m_2$.
Ответ: Наименьшая суммарная масса растворов равна:
$2\sqrt{\frac{m_1 m_2}{c}}$, если $\frac{m_2}{c} \le m_1 \le m_2 c$;
$m_1 + \frac{m_2}{c}$, если $m_1 < \frac{m_2}{c}$;
$\frac{m_1}{c} + m_2$, если $m_1 > m_2 c$.
Другие задания:
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