Номер 49, страница 74, 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

Часть 2. Глава 5. Производная. Параграф 3. Физический и геометрический смысл производной. 3.2. Касательная к графику функции. Задачи - номер 49, страница 74.

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                    "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: []
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                  #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"
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            "field_display_branch_in_title" => "1"
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            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1074}
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            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" => 1119427
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
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            "field_branch_order" => "5"
            "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: []
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                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
                  #appends: []
                  #dispatchesEvents: []
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                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "5"
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            "field_display_branch_in_title" => "1"
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            "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"
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1109 …2}
                    "field_class" => Illuminate\Database\Eloquent\Collection {#1111 …2}
                    "field_publisher" => Illuminate\Database\Eloquent\Collection {#1113 …2}
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                    "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}
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                    "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}
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                    "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
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                    "field_tasks_count" => "1063"
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                    "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}
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                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1135 …2}
                    "field_metatags_title" => null
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                    "breadcrumbs" => array:3 [ …3]
                  ]
                  #original: array:50 [
                    "id" => 4295
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1109 …2}
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                    "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}
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                    "field_level_of_education" => Illuminate\Database\Eloquent\Collection {#1128 …2}
                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1129 …2}
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                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1130 …2}
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                    "field_part" => "1, 2"
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                    "field_for_whom" => "Учебник для учащихся 10 класса общеобразовательной школы общественно-гуманитарного направления"
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                    "field_tasks_count" => "1063"
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                    "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]
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                    "field_popular_book" => null
                    "field_recommended_books" => Illuminate\Database\Eloquent\Collection {#1132 …2}
                    "field_new_book" => Illuminate\Database\Eloquent\Collection {#1133 …2}
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                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1135 …2}
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                    "field_metatags_description" => null
                    "field_h1" => null
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                    "field_description_bottom" => null
                    "breadcrumbs" => array:3 [ …3]
                  ]
                  #changes: []
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                    0 => "*"
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                }
              ]
              #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: []
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                  #perPage: 15
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                  #escapeWhenCastingToString: false
                  #attributes: array:24 [
                    "id" => 1119426
                    "created_at" => "2026-04-10 13:58:26"
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                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1138 …2}
                    "field_page_start" => "5"
                    "field_branch_display" => "0"
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                    "field_branch_title_in_content" => "0"
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                    "field_h1" => null
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                    "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"
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                    "field_display_branch_in_title" => "1"
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                    "field_display_branch_page" => "1"
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                    "field_navigation_title" => null
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                    "field_metatags_description" => null
                    "field_h1" => null
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                    "field_branch_cover" => []
                    "field_branch_covers" => []
                    "book" => Illuminate\Database\Eloquent\Collection {#1140 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1141 …2}
                  ]
                  #changes: []
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                  #classCastCache: []
                  #attributeCastCache: []
                  #dateFormat: null
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                  #touches: []
                  +timestamps: true
                  +usesUniqueIds: false
                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119427
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Производная"
            "field_branch_order" => "5"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1105}
            "field_page_start" => "5"
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            "field_description_top" => null
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            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1107}
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          #attributeCastCache: []
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          #hidden: []
          #visible: []
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          #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" => 1119437
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Физический и геометрический смысл производной"
            "field_branch_order" => "3"
            "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: []
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                  #attributeCastCache: []
                  #dateFormat: null
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                  #guarded: array:1 [
                    0 => "*"
                  ]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "59"
            "field_branch_display" => "0"
            "field_branch_expanded" => "0"
            "field_display_branch_in_title" => "1"
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            "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
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            "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}
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                    "field_publication_type" => Illuminate\Database\Eloquent\Collection {#1168 …2}
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            "book" => Illuminate\Database\Eloquent\Collection {#1318
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            "id" => 1300992
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            "edition" => Illuminate\Database\Eloquent\Collection {#1415
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                0 => App\Models\Edition {#1407
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            "text" => "<p><strong>49. (3)</strong> Найдите координаты точки пересечения двух касательных, проведенных к графику функции $y=\frac{x^2+1}{x-3}$: первая в точке на графике с абсциссой $x=4$, а вторая в точке с абсциссой $x=-2$.</p>"
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            "task" => array:2 [
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            "text" => "<p><strong>49. (3)</strong> Найдите координаты точки пересечения двух касательных, проведенных к графику функции $y=\frac{x^2+1}{x-3}$: первая в точке на графике с абсциссой $x=4$, а вторая в точке с абсциссой $x=-2$.</p>"
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            "id" => 1552028
            "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"
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            "text" => "<p>\tДля решения задачи необходимо найти уравнения двух касательных к графику функции $y = \frac{x^2 + 1}{x - 3}$ в заданных точках, а затем найти координаты точки их пересечения, решив систему уравнений этих касательных.</p><p>\tОбщее уравнение касательной к графику функции $f(x)$ в точке с абсциссой $x_0$ имеет вид: $y = f(x_0) + f'(x_0)(x - x_0)$.</p><p>\t<strong>1. Найдем производную функции.</strong></p><p>\tДана функция $f(x) = \frac{x^2 + 1}{x - 3}$. Для нахождения производной используем правило дифференцирования частного $(\frac{u}{v})' = \frac{u'v - uv'}{v^2}$:</p><p>\t$f'(x) = \frac{(x^2+1)'(x-3) - (x^2+1)(x-3)'}{(x-3)^2} = \frac{2x(x-3) - (x^2+1)(1)}{(x-3)^2} = \frac{2x^2 - 6x - x^2 - 1}{(x-3)^2} = \frac{x^2 - 6x - 1}{(x-3)^2}$.</p><p>\t<strong>2. Найдем уравнение первой касательной в точке с абсциссой $x_0 = 4$.</strong></p><p>\tСначала найдем значение функции в этой точке:\t$f(4) = \frac{4^2 + 1}{4 - 3} = \frac{16 + 1}{1} = 17$.</p><p>\tЗатем найдем значение производной (угловой коэффициент касательной) в этой точке:\t$f'(4) = \frac{4^2 - 6(4) - 1}{(4-3)^2} = \frac{16 - 24 - 1}{1^2} = -9$.</p><p>\tТеперь подставим найденные значения в уравнение касательной:\t$y = 17 + (-9)(x - 4) = 17 - 9x + 36 = -9x + 53$.</p><p>\tТаким образом, уравнение первой касательной: $y_1 = -9x + 53$.</p><p>\t<strong>3. Найдем уравнение второй касательной в точке с абсциссой $x_0 = -2$.</strong></p><p>\tНайдем значение функции в этой точке:\t$f(-2) = \frac{(-2)^2 + 1}{-2 - 3} = \frac{4+1}{-5} = \frac{5}{-5} = -1$.</p><p>\tНайдем значение производной в этой точке:\t$f'(-2) = \frac{(-2)^2 - 6(-2) - 1}{(-2-3)^2} = \frac{4 + 12 - 1}{(-5)^2} = \frac{15}{25} = \frac{3}{5}$.</p><p>\tПодставим значения в уравнение касательной:\t$y = -1 + \frac{3}{5}(x - (-2)) = -1 + \frac{3}{5}(x + 2) = -1 + \frac{3}{5}x + \frac{6}{5} = \frac{3}{5}x + \frac{1}{5}$.</p><p>\tТаким образом, уравнение второй касательной: $y_2 = \frac{3}{5}x + \frac{1}{5}$.</p><p>\t<strong>4. Найдем координаты точки пересечения двух касательных.</strong></p><p>\tДля нахождения точки пересечения необходимо приравнять правые части уравнений касательных ($y_1 = y_2$):\t$-9x + 53 = \frac{3}{5}x + \frac{1}{5}$.</p><p>\tЧтобы избавиться от дробей, умножим обе части уравнения на 5:\t$5(-9x + 53) = 5(\frac{3}{5}x + \frac{1}{5})$\t$-45x + 265 = 3x + 1$.</p><p>\tСгруппируем слагаемые с переменной $x$ в одной части уравнения, а константы — в другой:\t$265 - 1 = 3x + 45x$\t$264 = 48x$.</p><p>\tОтсюда найдем абсциссу точки пересечения:\t$x = \frac{264}{48} = \frac{11}{2} = 5.5$.</p><p>\tТеперь найдем ординату точки пересечения, подставив найденное значение $x$ в уравнение любой из касательных. Воспользуемся уравнением первой касательной:\t$y = -9(\frac{11}{2}) + 53 = -\frac{99}{2} + \frac{106}{2} = \frac{7}{2} = 3.5$.</p><p>\tКоординаты точки пересечения двух касательных: $(\frac{11}{2}; \frac{7}{2})$.</p><p>\t<strong>Ответ:</strong> $(\frac{11}{2}; \frac{7}{2})$.</p>"
          ]
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            "text" => "<p>\tДля решения задачи необходимо найти уравнения двух касательных к графику функции $y = \frac{x^2 + 1}{x - 3}$ в заданных точках, а затем найти координаты точки их пересечения, решив систему уравнений этих касательных.</p><p>\tОбщее уравнение касательной к графику функции $f(x)$ в точке с абсциссой $x_0$ имеет вид: $y = f(x_0) + f'(x_0)(x - x_0)$.</p><p>\t<strong>1. Найдем производную функции.</strong></p><p>\tДана функция $f(x) = \frac{x^2 + 1}{x - 3}$. Для нахождения производной используем правило дифференцирования частного $(\frac{u}{v})' = \frac{u'v - uv'}{v^2}$:</p><p>\t$f'(x) = \frac{(x^2+1)'(x-3) - (x^2+1)(x-3)'}{(x-3)^2} = \frac{2x(x-3) - (x^2+1)(1)}{(x-3)^2} = \frac{2x^2 - 6x - x^2 - 1}{(x-3)^2} = \frac{x^2 - 6x - 1}{(x-3)^2}$.</p><p>\t<strong>2. Найдем уравнение первой касательной в точке с абсциссой $x_0 = 4$.</strong></p><p>\tСначала найдем значение функции в этой точке:\t$f(4) = \frac{4^2 + 1}{4 - 3} = \frac{16 + 1}{1} = 17$.</p><p>\tЗатем найдем значение производной (угловой коэффициент касательной) в этой точке:\t$f'(4) = \frac{4^2 - 6(4) - 1}{(4-3)^2} = \frac{16 - 24 - 1}{1^2} = -9$.</p><p>\tТеперь подставим найденные значения в уравнение касательной:\t$y = 17 + (-9)(x - 4) = 17 - 9x + 36 = -9x + 53$.</p><p>\tТаким образом, уравнение первой касательной: $y_1 = -9x + 53$.</p><p>\t<strong>3. Найдем уравнение второй касательной в точке с абсциссой $x_0 = -2$.</strong></p><p>\tНайдем значение функции в этой точке:\t$f(-2) = \frac{(-2)^2 + 1}{-2 - 3} = \frac{4+1}{-5} = \frac{5}{-5} = -1$.</p><p>\tНайдем значение производной в этой точке:\t$f'(-2) = \frac{(-2)^2 - 6(-2) - 1}{(-2-3)^2} = \frac{4 + 12 - 1}{(-5)^2} = \frac{15}{25} = \frac{3}{5}$.</p><p>\tПодставим значения в уравнение касательной:\t$y = -1 + \frac{3}{5}(x - (-2)) = -1 + \frac{3}{5}(x + 2) = -1 + \frac{3}{5}x + \frac{6}{5} = \frac{3}{5}x + \frac{1}{5}$.</p><p>\tТаким образом, уравнение второй касательной: $y_2 = \frac{3}{5}x + \frac{1}{5}$.</p><p>\t<strong>4. Найдем координаты точки пересечения двух касательных.</strong></p><p>\tДля нахождения точки пересечения необходимо приравнять правые части уравнений касательных ($y_1 = y_2$):\t$-9x + 53 = \frac{3}{5}x + \frac{1}{5}$.</p><p>\tЧтобы избавиться от дробей, умножим обе части уравнения на 5:\t$5(-9x + 53) = 5(\frac{3}{5}x + \frac{1}{5})$\t$-45x + 265 = 3x + 1$.</p><p>\tСгруппируем слагаемые с переменной $x$ в одной части уравнения, а константы — в другой:\t$265 - 1 = 3x + 45x$\t$264 = 48x$.</p><p>\tОтсюда найдем абсциссу точки пересечения:\t$x = \frac{264}{48} = \frac{11}{2} = 5.5$.</p><p>\tТеперь найдем ординату точки пересечения, подставив найденное значение $x$ в уравнение любой из касательных. Воспользуемся уравнением первой касательной:\t$y = -9(\frac{11}{2}) + 53 = -\frac{99}{2} + \frac{106}{2} = \frac{7}{2} = 3.5$.</p><p>\tКоординаты точки пересечения двух касательных: $(\frac{11}{2}; \frac{7}{2})$.</p><p>\t<strong>Ответ:</strong> $(\frac{11}{2}; \frac{7}{2})$.</p>"
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№49 (с. 74)
Условие. №49 (с. 74)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Пак Олег Владимирович, Ардакулы Дархан, Ескендирова Елена Викторовна, издательство Алматыкітап баспасы, Алматы, 2019, Часть 2, страница 74, номер 49, Условие

49. (3) Найдите координаты точки пересечения двух касательных, проведенных к графику функции $y=\frac{x^2+1}{x-3}$: первая в точке на графике с абсциссой $x=4$, а вторая в точке с абсциссой $x=-2$.

Решение 2 (rus). №49 (с. 74)

Для решения задачи необходимо найти уравнения двух касательных к графику функции $y = \frac{x^2 + 1}{x - 3}$ в заданных точках, а затем найти координаты точки их пересечения, решив систему уравнений этих касательных.

Общее уравнение касательной к графику функции $f(x)$ в точке с абсциссой $x_0$ имеет вид: $y = f(x_0) + f'(x_0)(x - x_0)$.

1. Найдем производную функции.

Дана функция $f(x) = \frac{x^2 + 1}{x - 3}$. Для нахождения производной используем правило дифференцирования частного $(\frac{u}{v})' = \frac{u'v - uv'}{v^2}$:

$f'(x) = \frac{(x^2+1)'(x-3) - (x^2+1)(x-3)'}{(x-3)^2} = \frac{2x(x-3) - (x^2+1)(1)}{(x-3)^2} = \frac{2x^2 - 6x - x^2 - 1}{(x-3)^2} = \frac{x^2 - 6x - 1}{(x-3)^2}$.

2. Найдем уравнение первой касательной в точке с абсциссой $x_0 = 4$.

Сначала найдем значение функции в этой точке: $f(4) = \frac{4^2 + 1}{4 - 3} = \frac{16 + 1}{1} = 17$.

Затем найдем значение производной (угловой коэффициент касательной) в этой точке: $f'(4) = \frac{4^2 - 6(4) - 1}{(4-3)^2} = \frac{16 - 24 - 1}{1^2} = -9$.

Теперь подставим найденные значения в уравнение касательной: $y = 17 + (-9)(x - 4) = 17 - 9x + 36 = -9x + 53$.

Таким образом, уравнение первой касательной: $y_1 = -9x + 53$.

3. Найдем уравнение второй касательной в точке с абсциссой $x_0 = -2$.

Найдем значение функции в этой точке: $f(-2) = \frac{(-2)^2 + 1}{-2 - 3} = \frac{4+1}{-5} = \frac{5}{-5} = -1$.

Найдем значение производной в этой точке: $f'(-2) = \frac{(-2)^2 - 6(-2) - 1}{(-2-3)^2} = \frac{4 + 12 - 1}{(-5)^2} = \frac{15}{25} = \frac{3}{5}$.

Подставим значения в уравнение касательной: $y = -1 + \frac{3}{5}(x - (-2)) = -1 + \frac{3}{5}(x + 2) = -1 + \frac{3}{5}x + \frac{6}{5} = \frac{3}{5}x + \frac{1}{5}$.

Таким образом, уравнение второй касательной: $y_2 = \frac{3}{5}x + \frac{1}{5}$.

4. Найдем координаты точки пересечения двух касательных.

Для нахождения точки пересечения необходимо приравнять правые части уравнений касательных ($y_1 = y_2$): $-9x + 53 = \frac{3}{5}x + \frac{1}{5}$.

Чтобы избавиться от дробей, умножим обе части уравнения на 5: $5(-9x + 53) = 5(\frac{3}{5}x + \frac{1}{5})$ $-45x + 265 = 3x + 1$.

Сгруппируем слагаемые с переменной $x$ в одной части уравнения, а константы — в другой: $265 - 1 = 3x + 45x$ $264 = 48x$.

Отсюда найдем абсциссу точки пересечения: $x = \frac{264}{48} = \frac{11}{2} = 5.5$.

Теперь найдем ординату точки пересечения, подставив найденное значение $x$ в уравнение любой из касательных. Воспользуемся уравнением первой касательной: $y = -9(\frac{11}{2}) + 53 = -\frac{99}{2} + \frac{106}{2} = \frac{7}{2} = 3.5$.

Координаты точки пересечения двух касательных: $(\frac{11}{2}; \frac{7}{2})$.

Ответ: $(\frac{11}{2}; \frac{7}{2})$.

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