Номер 652, страница 184 - гдз по алгебре 9 класс учебник Макарычев, Миндюк
Авторы: Макарычев Ю. Н., Миндюк Н. Г., Нешков К. И., Суворова С. Б.
Тип: Учебник
Издательство: Просвещение
Год издания: 2023 - 2026
Уровень обучения: базовый
Цвет обложки: белый, зелёный, фиолетовый
ISBN: 978-5-09-112135-3
Допущено Министерством просвещения Российской Федерации
Популярные ГДЗ в 9 классе
Глава 5. Арифметическая и геометрическая прогрессии. Параграф 10. Геометрическая прогрессия. Дополнительные упражнения к главе 5 - номер 652, страница 184.
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" => 171841 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_page_start" => "184" "field_page_end" => null "field_url" => "/9-klass/algebra/makarychev-fgos/652" "field_display_title" => "652" "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 {#1080 #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" => 171142 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Арифметическая и геометрическая прогрессии" "field_branch_order" => "5" "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 [ …7] #original: array:7 [ …7] #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_page_start" => "149" "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 [ …50] #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 {#1077 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 171142 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Арифметическая и геометрическая прогрессии" "field_branch_order" => "5" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1039} "field_page_start" => "149" "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 {#1077} ] #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 {#1325 #items: array:3 [ 0 => App\Models\Branch {#1078 #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" => 171142 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Арифметическая и геометрическая прогрессии" "field_branch_order" => "5" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1081 #items: array:1 [ 0 => App\Models\Term {#1079 #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 [ …7] #original: array:7 [ …7] #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_page_start" => "149" "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 {#1082 #items: array:1 [ 0 => App\Models\Book {#1083 #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 [ …50] #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 {#1119 #items: [] #escapeWhenCastingToString: false } ] #original: array:24 [ "id" => 171142 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Арифметическая и геометрическая прогрессии" "field_branch_order" => "5" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1081} "field_page_start" => "149" "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 {#1082} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1119} ] #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 {#1120 #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" => 171148 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Геометрическая прогрессия" "field_branch_order" => "10" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1121 #items: array:1 [ 0 => App\Models\Term {#1122 #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 [ …7] #original: array:7 [ …7] #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_page_start" => "167" "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 {#1123 #items: array:1 [ 0 => App\Models\Book {#1124 #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 [ …50] #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 {#1160 #items: array:1 [ 0 => App\Models\Branch {#1161 #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" => 171148 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Геометрическая прогрессия" "field_branch_order" => "10" "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1121} "field_page_start" => "167" "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 {#1123} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1160} ] #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 {#1202 #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" => 171153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Дополнительные упражнения к главе 5" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1203 #items: [] #escapeWhenCastingToString: false } "field_page_start" => "182" "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 {#1204 #items: array:1 [ 0 => App\Models\Book {#1205 #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 [ …50] #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 {#1241 #items: array:1 [ 0 => App\Models\Branch {#1242 #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" => 171153 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "field_display_title" => "Дополнительные упражнения к главе 5" "field_branch_order" => null "field_url" => null "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1203} "field_page_start" => "182" "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 {#1204} "branch_parent" => Illuminate\Database\Eloquent\Collection {#1241} ] #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 {#1342 #items: array:9 [ 0 => App\Models\Element {#1358 #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" => 179114 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1367 #items: array:1 [ 0 => App\Models\Edition {#1359 #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" => "171841" "type" => "task" ] "text" => """ <p><strong>652</strong>. Найдите сумму, слагаемыми которой являются последовательные члены арифметической прогрессии:</p><figure><figure>\n <img src="/media/algebra_09/makarychev-2023/0-00/652.webp?ts=1744067389" alt="Найти сумму, слагаемыми которой являются последовательные члены арифметической прогрессии" loading="lazy" width="715" height="185">\n </figure>\n <figcaption> </figcaption></figure> """ "img" => array:1 [ 0 => array:5 [ "name" => "652-1.jpg" "alt" => null "width" => "1602" "height" => 274 "path" => "/media/algebra_09/makarychev-2023/0-00/652-1.webp?ts=1734090875" ] ] ] #original: array:7 [ "id" => 179114 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1367} "task" => array:2 [ "refs" => "171841" "type" => "task" ] "text" => """ <p><strong>652</strong>. Найдите сумму, слагаемыми которой являются последовательные члены арифметической прогрессии:</p><figure><figure>\n <img src="/media/algebra_09/makarychev-2023/0-00/652.webp?ts=1744067389" alt="Найти сумму, слагаемыми которой являются последовательные члены арифметической прогрессии" loading="lazy" width="715" height="185">\n </figure>\n <figcaption> </figcaption></figure> """ "img" => array:1 [ 0 => array:5 [ "name" => "652-1.jpg" "alt" => null "width" => "1602" "height" => 274 "path" => "/media/algebra_09/makarychev-2023/0-00/652-1.webp?ts=1734090875" ] ] ] #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 {#1365 #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" => 180088 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1375 #items: array:1 [ 0 => App\Models\Edition {#1366 #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" => "171841" "type" => "task" ] "img" => array:2 [ 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#dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 2 => App\Models\Element {#1373 #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" => 180821 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1383 #items: array:1 [ 0 => App\Models\Edition {#1374 #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: [] 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array:2 [ "refs" => "171841" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "652-1.png" "alt" => null "width" => "619" "height" => 1946 "path" => "/media/algebra_09/makarychev-2023/4-00/652-1.webp?ts=1734091973" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 5 => App\Models\Element {#1397 #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" => 182936 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1407 #items: array:1 [ 0 => App\Models\Edition {#1398 #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" => "171841" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "652-1.png" "alt" => null "width" => "650" "height" => 621 "path" => "/media/algebra_09/makarychev-2023/5-00/652-1.webp?ts=1734092863" ] ] ] #original: array:6 [ "id" => 182936 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1407} "task" => array:2 [ "refs" => "171841" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "652-1.png" "alt" => null "width" => "650" "height" => 621 "path" => "/media/algebra_09/makarychev-2023/5-00/652-1.webp?ts=1734092863" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 6 => App\Models\Element {#1405 #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" => 183611 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1415 #items: array:1 [ 0 => App\Models\Edition {#1406 #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" => "171841" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "652-1.png" "alt" => null "width" => "1349" "height" => 474 "path" => "/media/algebra_09/makarychev-2023/6-00/652-1.webp?ts=1734093030" ] ] ] #original: array:6 [ "id" => 183611 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1415} "task" => array:2 [ "refs" => "171841" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "652-1.png" "alt" => null "width" => "1349" "height" => 474 "path" => "/media/algebra_09/makarychev-2023/6-00/652-1.webp?ts=1734093030" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 7 => App\Models\Element {#1413 #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" => 184090 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1423 #items: array:1 [ 0 => App\Models\Edition {#1414 #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" => "171841" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "652-1.jpg" "alt" => null "width" => "1578" "height" => 715 "path" => "/media/algebra_09/makarychev-2023/7-00/652-1.webp?ts=1734093441" ] ] ] #original: array:6 [ "id" => 184090 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1423} "task" => array:2 [ "refs" => "171841" "type" => "task" ] "img" => array:1 [ 0 => array:5 [ "name" => "652-1.jpg" "alt" => null "width" => "1578" "height" => 715 "path" => "/media/algebra_09/makarychev-2023/7-00/652-1.webp?ts=1734093441" ] ] ] #changes: [] #casts: [] #classCastCache: [] #attributeCastCache: [] #dateFormat: null #appends: [] #dispatchesEvents: [] #observables: [] #relations: [] #touches: [] +timestamps: true +usesUniqueIds: false #hidden: [] #visible: [] #fillable: [] #guarded: array:1 [ 0 => "*" ] } 8 => App\Models\Element {#1421 #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" => 1349430 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1431 #items: array:1 [ 0 => App\Models\Edition {#1422 #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" => "171841" "type" => "task" ] "text" => "<p><strong>а)</strong> Данная сумма $2 + 6 + 10 + \ldots + 198$ представляет собой сумму членов арифметической прогрессии. Определим её параметры. Первый член прогрессии $a_1 = 2$. Разность прогрессии $d$ можно найти как разность между вторым и первым членами: $d = 6 - 2 = 4$. Последний член прогрессии $a_n = 198$.<br>Для вычисления суммы необходимо найти количество членов $n$. Воспользуемся формулой n-го члена арифметической прогрессии: $a_n = a_1 + (n-1)d$. Подставим известные значения и решим уравнение относительно $n$:<br>$198 = 2 + (n-1) \cdot 4$<br>$198 - 2 = 4(n-1)$<br>$196 = 4(n-1)$<br>$n-1 = \frac{196}{4}$<br>$n-1 = 49$<br>$n = 50$<br>Теперь, зная, что в прогрессии 50 членов, мы можем найти её сумму по формуле $S_n = \frac{a_1 + a_n}{2} \cdot n$.<br>$S_{50} = \frac{2 + 198}{2} \cdot 50 = \frac{200}{2} \cdot 50 = 100 \cdot 50 = 5000$.<br>Ответ: $5000$.</p><p><strong>б)</strong> Сумма $95 + 85 + 75 + \ldots + (-155)$ также является суммой членов арифметической прогрессии. Определим её параметры. Первый член $a_1 = 95$. Разность прогрессии $d$ равна $d = 85 - 95 = -10$. Последний член $a_n = -155$.<br>Сначала найдем количество членов $n$ в этой прогрессии, используя формулу $a_n = a_1 + (n-1)d$. Подставим известные значения:<br>$-155 = 95 + (n-1) \cdot (-10)$<br>$-155 - 95 = -10(n-1)$<br>$-250 = -10(n-1)$<br>$n-1 = \frac{-250}{-10}$<br>$n-1 = 25$<br>$n = 26$<br>В прогрессии 26 членов. Теперь вычислим сумму по формуле $S_n = \frac{a_1 + a_n}{2} \cdot n$.<br>$S_{26} = \frac{95 + (-155)}{2} \cdot 26 = \frac{95 - 155}{2} \cdot 26 = \frac{-60}{2} \cdot 26 = -30 \cdot 26 = -780$.<br>Ответ: $-780$.</p>" ] #original: array:6 [ "id" => 1349430 "created_at" => "2026-04-10 13:58:26" "updated_at" => null "edition" => Illuminate\Database\Eloquent\Collection {#1431} "task" => array:2 [ "refs" => "171841" "type" => "task" ] "text" => "<p><strong>а)</strong> Данная сумма $2 + 6 + 10 + \ldots + 198$ представляет собой сумму членов арифметической прогрессии. Определим её параметры. Первый член прогрессии $a_1 = 2$. Разность прогрессии $d$ можно найти как разность между вторым и первым членами: $d = 6 - 2 = 4$. Последний член прогрессии $a_n = 198$.<br>Для вычисления суммы необходимо найти количество членов $n$. Воспользуемся формулой n-го члена арифметической прогрессии: $a_n = a_1 + (n-1)d$. Подставим известные значения и решим уравнение относительно $n$:<br>$198 = 2 + (n-1) \cdot 4$<br>$198 - 2 = 4(n-1)$<br>$196 = 4(n-1)$<br>$n-1 = \frac{196}{4}$<br>$n-1 = 49$<br>$n = 50$<br>Теперь, зная, что в прогрессии 50 членов, мы можем найти её сумму по формуле $S_n = \frac{a_1 + a_n}{2} \cdot n$.<br>$S_{50} = \frac{2 + 198}{2} \cdot 50 = \frac{200}{2} \cdot 50 = 100 \cdot 50 = 5000$.<br>Ответ: $5000$.</p><p><strong>б)</strong> Сумма $95 + 85 + 75 + \ldots + (-155)$ также является суммой членов арифметической прогрессии. Определим её параметры. Первый член $a_1 = 95$. Разность прогрессии $d$ равна $d = 85 - 95 = -10$. Последний член $a_n = -155$.<br>Сначала найдем количество членов $n$ в этой прогрессии, используя формулу $a_n = a_1 + (n-1)d$. Подставим известные значения:<br>$-155 = 95 + (n-1) \cdot (-10)$<br>$-155 - 95 = -10(n-1)$<br>$-250 = -10(n-1)$<br>$n-1 = \frac{-250}{-10}$<br>$n-1 = 25$<br>$n = 26$<br>В прогрессии 26 членов. Теперь вычислим сумму по формуле $S_n = \frac{a_1 + a_n}{2} \cdot n$.<br>$S_{26} = \frac{95 + (-155)}{2} \cdot 26 = \frac{95 - 155}{2} \cdot 26 = \frac{-60}{2} \cdot 26 = -30 \cdot 26 = -780$.<br>Ответ: $-780$.</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" => "171842" "type" => "task" ] "previous" => array:2 [ "refs" => "171840" "type" => "task" ] "book" => Illuminate\Database\Eloquent\Collection {#1437 #items: array:1 [ 0 => App\Models\Book {#1356 #connection: "mysql" #table: "books" #primaryKey: "id" #keyType: "int" +incrementing: false #with: [] #withCount: [] +preventsLazyLoading: false #perPage: 15 +exists: true +wasRecentlyCreated: false #escapeWhenCastingToString: false 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"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 {#1339 #items: array:1 [ 0 => App\Models\Term {#1338 #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: 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+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_metatags_title" => null "field_metatags_description" => null "field_h1" => null "field_description_top" => null "field_description_bottom" => "<!--Текст в низу страницы--> <h2> Учебный процесс с решебником Ключниковой </h2> <p> Изучение алгебры всегда связано с различными недопониманиями. Довольно часто у ребят не хватает времени, чтобы детально проработать каждый параграф. Теорию они проходят в спешке, так как основное внимание сосредоточено в основном на практических заданиях, которые учителя задают на дом в больших количествах. ГДЗ «<strong>Алгебра Учебник Макарычев, Миндюк, Нешков 9 класс (Просвещение, 2023г.)</strong>» позволит школьникам сбалансировать учебный процесс, не упуская ни одной мелочи. </p> <p> Многие ученики испытывают проблемы с пониманием таких аспектов: </p> <ol> <li>Действия над действительными числами.</li> <li>Погрешность и точность приближения?</li> <li>Свойства чётности и нечётности функций.</li> <li>Целое уравнение и его корни.</li> <li>Решение неравенств методом интервалов.</li> <li>Уравнение с двумя переменными и его график.</li> </ol> <p> Современные учебники часто снабжены недостаточно развернутой теорией, что мешает учащимся еще раз пробежаться по материалу, если они пропустили урок или не поняли объяснения преподавателя. Поэтому иногда подростки приступают к решению задач так до конца и не разобравшись в параграфах. Неудивительно, что потом в их работах обнаруживается много ошибок. Благодаря решебнику можно избежать любых недочетов при выполнении номеров. </p> <h2> Почему работать с решебником нужно правильно? </h2> <p> Школьники всегда делятся на две категории. Первые, даже с большим скрипом, но находят решения и ответы самостоятельно, а вот вторые постоянно списывают домашние задания и ничего толком в дисциплине не понимают. Но используя <strong>решебник по алгебре за 9 класс к учебнику Макарычева Ю.Н., Миндюка Н.Г., Нешкова К.И. (Просвещение)</strong> все ребята получают возможность полноценно разобраться в программе этого курса. </p> <p> Неправильное взаимодействие с пособием может привести к следующим последствиям: </p> <ol> <li>материал не будет освоен полностью;</li> <li>постоянные ошибки приведут к снижению успеваемости;</li> <li>отсутствие понимания даже элементарных уравнений;</li> <li>проваленные экзамены.</li> </ol> <p> Соблазн просто списать нужное упражнение несомненно очень велик. Но не стоит забывать о том, что тогда не удастся полностью понять суть изучаемой темы, а это непременно аукнется довольно быстро плохими оценками. Поэтому всегда стоит применять решебник строго по назначению - для самопроверки и работы над ошибками. </p> <h2> Хорошая подготовка д/з с ГДЗ к учебнику Макарычева </h2> <p> Любой учебный процесс - дело непредсказуемое. Даже отличники не застрахованы от получения двоек. Поэтому школьникам не только стоит быть предельно внимательными, но и систематически проверять себя по <strong>готовым решениям к учебнику Макарычева за 9 класс</strong>, написанными в соответствии с ФГОС. Сделать это очень просто, так как пособие находится в онлайн-доступе, и открыть его можно с любого гаджета, подключенного к Интернету. Тренировки со справочником не отнимают много времени, так как авторы снабдили его подробными решениями, верными ответами и многочисленными наглядными примерами, которые легко понять и запомнить. </p> <p> Онлайн-издание пригодится учащимся для многого: </p> <ul> <li>сверки д/з;</li> <li>подготовки к тестированиям;</li> <li>разбора проблематичных параграфов;</li> <li>проработки различных упущений, и т.д.</li> </ul> <p> Некоторые учителя сами советуют своим подопечным использовать решебник, так как прекрасно понимают, что иначе дети просто не справятся с программой. Конечно, есть и еще один вариант - занятия с репетитором. Но в наше время сложно найти преподавателя, который бы смог не только найти общий язык с учеником, но и доступно излагал материал. Кроме того, дополнительные уроки тоже отнимают уйму времени, а именно его у подростков и так мало. 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Довольно часто у ребят не хватает времени, чтобы детально проработать каждый параграф. Теорию они проходят в спешке, так как основное внимание сосредоточено в основном на практических заданиях, которые учителя задают на дом в больших количествах. ГДЗ «<strong>Алгебра Учебник Макарычев, Миндюк, Нешков 9 класс (Просвещение, 2023г.)</strong>» позволит школьникам сбалансировать учебный процесс, не упуская ни одной мелочи. </p> <p> Многие ученики испытывают проблемы с пониманием таких аспектов: </p> <ol> <li>Действия над действительными числами.</li> <li>Погрешность и точность приближения?</li> <li>Свойства чётности и нечётности функций.</li> <li>Целое уравнение и его корни.</li> <li>Решение неравенств методом интервалов.</li> <li>Уравнение с двумя переменными и его график.</li> </ol> <p> Современные учебники часто снабжены недостаточно развернутой теорией, что мешает учащимся еще раз пробежаться по материалу, если они пропустили урок или не поняли объяснения преподавателя. Поэтому иногда подростки приступают к решению задач так до конца и не разобравшись в параграфах. Неудивительно, что потом в их работах обнаруживается много ошибок. Благодаря решебнику можно избежать любых недочетов при выполнении номеров. </p> <h2> Почему работать с решебником нужно правильно? </h2> <p> Школьники всегда делятся на две категории. Первые, даже с большим скрипом, но находят решения и ответы самостоятельно, а вот вторые постоянно списывают домашние задания и ничего толком в дисциплине не понимают. Но используя <strong>решебник по алгебре за 9 класс к учебнику Макарычева Ю.Н., Миндюка Н.Г., Нешкова К.И. 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Поэтому школьникам не только стоит быть предельно внимательными, но и систематически проверять себя по <strong>готовым решениям к учебнику Макарычева за 9 класс</strong>, написанными в соответствии с ФГОС. Сделать это очень просто, так как пособие находится в онлайн-доступе, и открыть его можно с любого гаджета, подключенного к Интернету. Тренировки со справочником не отнимают много времени, так как авторы снабдили его подробными решениями, верными ответами и многочисленными наглядными примерами, которые легко понять и запомнить. </p> <p> Онлайн-издание пригодится учащимся для многого: </p> <ul> <li>сверки д/з;</li> <li>подготовки к тестированиям;</li> <li>разбора проблематичных параграфов;</li> <li>проработки различных упущений, и т.д.</li> </ul> <p> Некоторые учителя сами советуют своим подопечным использовать решебник, так как прекрасно понимают, что иначе дети просто не справятся с программой. Конечно, есть и еще один вариант - занятия с репетитором. Но в наше время сложно найти преподавателя, который бы смог не только найти общий язык с учеником, но и доступно излагал материал. Кроме того, дополнительные уроки тоже отнимают уйму времени, а именно его у подростков и так мало. 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№652 (с. 184)
Условие. №652 (с. 184)
Решение 8. №652 (с. 184)
а) Данная сумма $2 + 6 + 10 + \ldots + 198$ представляет собой сумму членов арифметической прогрессии. Определим её параметры. Первый член прогрессии $a_1 = 2$. Разность прогрессии $d$ можно найти как разность между вторым и первым членами: $d = 6 - 2 = 4$. Последний член прогрессии $a_n = 198$.
Для вычисления суммы необходимо найти количество членов $n$. Воспользуемся формулой n-го члена арифметической прогрессии: $a_n = a_1 + (n-1)d$. Подставим известные значения и решим уравнение относительно $n$:
$198 = 2 + (n-1) \cdot 4$
$198 - 2 = 4(n-1)$
$196 = 4(n-1)$
$n-1 = \frac{196}{4}$
$n-1 = 49$
$n = 50$
Теперь, зная, что в прогрессии 50 членов, мы можем найти её сумму по формуле $S_n = \frac{a_1 + a_n}{2} \cdot n$.
$S_{50} = \frac{2 + 198}{2} \cdot 50 = \frac{200}{2} \cdot 50 = 100 \cdot 50 = 5000$.
Ответ: $5000$.
б) Сумма $95 + 85 + 75 + \ldots + (-155)$ также является суммой членов арифметической прогрессии. Определим её параметры. Первый член $a_1 = 95$. Разность прогрессии $d$ равна $d = 85 - 95 = -10$. Последний член $a_n = -155$.
Сначала найдем количество членов $n$ в этой прогрессии, используя формулу $a_n = a_1 + (n-1)d$. Подставим известные значения:
$-155 = 95 + (n-1) \cdot (-10)$
$-155 - 95 = -10(n-1)$
$-250 = -10(n-1)$
$n-1 = \frac{-250}{-10}$
$n-1 = 25$
$n = 26$
В прогрессии 26 членов. Теперь вычислим сумму по формуле $S_n = \frac{a_1 + a_n}{2} \cdot n$.
$S_{26} = \frac{95 + (-155)}{2} \cdot 26 = \frac{95 - 155}{2} \cdot 26 = \frac{-60}{2} \cdot 26 = -30 \cdot 26 = -780$.
Ответ: $-780$.
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ПрисоединитьсяМы подготовили для вас ответ c подробным объяснением домашего задания по алгебре за 9 класс, для упражнения номер 652 расположенного на странице 184 к учебнику 2023 года издания для учащихся школ и гимназий.
Теперь на нашем сайте ГДЗ.ТОП вы всегда легко и бесплатно найдёте условие с правильным ответом на вопрос «Как решить ДЗ» и «Как сделать» задание по алгебре к упражнению №652 (с. 184), авторов: Макарычев (Юрий Николаевич), Миндюк (Нора Григорьевна), Нешков (Константин Иванович), Суворова (Светлана Борисовна), ФГОС (новый, красный) базовый уровень обучения учебного пособия издательства Просвещение.