Номер 3, страница 40, 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 2. Понятие производной. 2.5. Формулы для нахождения производной. Упражнения - номер 3, страница 40.

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            "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 {#1150}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1148}
          ]
          #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 {#1149
          #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
            "field_display_title" => "Производная"
            "field_branch_order" => "5"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1154
              #items: array:1 [
                0 => App\Models\Term {#1151
                  #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 [
                      "field_accusative_case" => "Главу"
                      "field_creative_case" => "Главой"
                      "field_dative_case" => "Главе"
                      "field_genitive_case" => "Главы"
                      "field_nominative_case" => "Глава"
                      "field_prepositional_case" => "Главе"
                    ]
                    "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 [
                      "field_accusative_case" => "Главу"
                      "field_creative_case" => "Главой"
                      "field_dative_case" => "Главе"
                      "field_genitive_case" => "Главы"
                      "field_nominative_case" => "Глава"
                      "field_prepositional_case" => "Главе"
                    ]
                    "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" => "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 {#1153
              #items: array:1 [
                0 => App\Models\Book {#1120}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1152
              #items: array:1 [
                0 => App\Models\Branch {#1034}
              ]
              #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 {#1154}
            "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 {#1153}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1152}
          ]
          #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 {#1155
          #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" => 1119431
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Понятие производной"
            "field_branch_order" => "2"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1159
              #items: array:1 [
                0 => App\Models\Term {#1156
                  #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 [
                      "field_accusative_case" => "Параграф"
                      "field_creative_case" => "Параграфом"
                      "field_dative_case" => "Параграфу"
                      "field_genitive_case" => "Параграфа"
                      "field_nominative_case" => "Параграф"
                      "field_prepositional_case" => "Параграфе"
                    ]
                    "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 [
                      "field_accusative_case" => "Параграф"
                      "field_creative_case" => "Параграфом"
                      "field_dative_case" => "Параграфу"
                      "field_genitive_case" => "Параграфа"
                      "field_nominative_case" => "Параграф"
                      "field_prepositional_case" => "Параграфе"
                    ]
                    "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" => "25"
            "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 {#1158
              #items: array:1 [
                0 => App\Models\Book {#1120}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1167
              #items: array:1 [
                0 => App\Models\Branch {#1166
                  #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
                    "field_display_title" => "Производная"
                    "field_branch_order" => "5"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1168
                      #items: array:1 [ …1]
                       …1
                    }
                    "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 {#1169 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1170 …2}
                  ]
                  #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 {#1168 …1}
                    "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 {#1169 …2}
                    "branch_parent" => Illuminate\Database\Eloquent\Collection {#1170 …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" => 1119431
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Понятие производной"
            "field_branch_order" => "2"
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1159}
            "field_page_start" => "25"
            "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 {#1158}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1167}
          ]
          #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 {#1160
          #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" => 1119433
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "2.5. Формулы для нахождения производной"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1157
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "37"
            "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 {#1163
              #items: array:1 [
                0 => App\Models\Book {#1120}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1176
              #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" => 1119431
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Понятие производной"
                    "field_branch_order" => "2"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1177 …2}
                    "field_page_start" => "25"
                    "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" => 1119431
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
                    "field_display_title" => "Понятие производной"
                    "field_branch_order" => "2"
                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1177 …2}
                    "field_page_start" => "25"
                    "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" => 1119433
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "2.5. Формулы для нахождения производной"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1157}
            "field_page_start" => "37"
            "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 {#1163}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1176}
          ]
          #changes: []
          #casts: []
          #classCastCache: []
          #attributeCastCache: []
          #dateFormat: null
          #appends: []
          #dispatchesEvents: []
          #observables: []
          #relations: []
          #touches: []
          +timestamps: true
          +usesUniqueIds: false
          #hidden: []
          #visible: []
          #fillable: []
          #guarded: array:1 [
            0 => "*"
          ]
        }
        4 => App\Models\Branch {#1164
          #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" => 1119434
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
            "field_display_title" => "Упражнения"
            "field_branch_order" => null
            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1161
              #items: []
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "39"
            "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 {#1172
              #items: array:1 [
                0 => App\Models\Book {#1120}
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1185
              #items: array:1 [
                0 => App\Models\Branch {#1184
                  #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" => 1119433
                    "created_at" => "2026-04-10 13:58:26"
                    "updated_at" => null
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            "text" => "<p><strong>Упражнение 3</strong></p><p>Докажите, что: а) $(\arcsin)' = \frac{1}{\sqrt{1-x^2}}$; б) $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$ (формула 9); в) $(\operatorname{arcctg} x)' = -\frac{1}{1+x^2}$ (формула 11).</p><p>Поскольку правило дифференцирования сложной функции мы уже обсудили, то формулы 3-11 из второй колонки таблицы можно считать доказанными. Приведем несколько примеров их применения.</p>"
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            "text" => "<p><strong>Упражнение 3</strong></p><p>Докажите, что: а) $(\arcsin)' = \frac{1}{\sqrt{1-x^2}}$; б) $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$ (формула 9); в) $(\operatorname{arcctg} x)' = -\frac{1}{1+x^2}$ (формула 11).</p><p>Поскольку правило дифференцирования сложной функции мы уже обсудили, то формулы 3-11 из второй колонки таблицы можно считать доказанными. Приведем несколько примеров их применения.</p>"
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            "text" => "<p><strong>а)</strong> Докажем формулу для производной арксинуса: $(\arcsin x)' = \frac{1}{\sqrt{1-x^2}}$.</p><p>Пусть $y = \arcsin x$. По определению арксинуса, это эквивалентно $x = \sin y$, где $x \in [-1, 1]$ и $y \in [-\frac{\pi}{2}, \frac{\pi}{2}]$.</p><p>Для нахождения производной $\frac{dy}{dx}$ воспользуемся правилом дифференцирования обратной функции. Продифференцируем обе части равенства $x = \sin y$ по переменной $x$:</p><p>$\frac{d}{dx}(x) = \frac{d}{dx}(\sin y)$</p><p>Применяя правило дифференцирования сложной функции для правой части, получаем:</p><p>$1 = (\cos y) \cdot \frac{dy}{dx}$</p><p>Отсюда выразим $\frac{dy}{dx}$:</p><p>$\frac{dy}{dx} = \frac{1}{\cos y}$</p><p>Теперь нам нужно выразить $\cos y$ через $x$. Воспользуемся основным тригонометрическим тождеством: $\sin^2 y + \cos^2 y = 1$.</p><p>Отсюда $\cos^2 y = 1 - \sin^2 y$. Так как $x = \sin y$, то $\cos^2 y = 1 - x^2$.</p><p>Следовательно, $\cos y = \pm \sqrt{1 - x^2}$.</p><p>Чтобы выбрать правильный знак, рассмотрим область значений функции $y = \arcsin x$, которая является отрезком $[-\frac{\pi}{2}, \frac{\pi}{2}]$. На этом отрезке косинус неотрицателен, то есть $\cos y \ge 0$. Поэтому мы выбираем знак плюс:</p><p>$\cos y = \sqrt{1 - x^2}$</p><p>Заметим, что производная не определена, когда $\cos y = 0$, то есть при $y = \pm \frac{\pi}{2}$, что соответствует $x = \pm 1$. Таким образом, формула верна для $x \in (-1, 1)$.</p><p>Подставляя выражение для $\cos y$ в формулу для производной, получаем:</p><p>$\frac{dy}{dx} = (\arcsin x)' = \frac{1}{\sqrt{1 - x^2}}$</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> $(\arcsin x)' = \frac{1}{\sqrt{1-x^2}}$.</p><p><strong>б)</strong> Докажем формулу для производной арккосинуса: $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$.</p><p>Пусть $y = \arccos x$. По определению арккосинуса, это эквивалентно $x = \cos y$, где $x \in [-1, 1]$ и $y \in [0, \pi]$.</p><p>Продифференцируем обе части равенства $x = \cos y$ по переменной $x$:</p><p>$\frac{d}{dx}(x) = \frac{d}{dx}(\cos y)$</p><p>$1 = (-\sin y) \cdot \frac{dy}{dx}$</p><p>Выразим $\frac{dy}{dx}$:</p><p>$\frac{dy}{dx} = -\frac{1}{\sin y}$</p><p>Теперь выразим $\sin y$ через $x$. Из основного тригонометрического тождества $\sin^2 y + \cos^2 y = 1$ следует, что $\sin^2 y = 1 - \cos^2 y$.</p><p>Так как $x = \cos y$, получаем $\sin^2 y = 1 - x^2$.</p><p>Следовательно, $\sin y = \pm \sqrt{1 - x^2}$.</p><p>Область значений функции $y = \arccos x$ — это отрезок $[0, \pi]$. На этом отрезке синус неотрицателен, то есть $\sin y \ge 0$. Поэтому мы выбираем знак плюс:</p><p>$\sin y = \sqrt{1 - x^2}$</p><p>Производная не определена при $\sin y = 0$, то есть при $y = 0$ и $y = \pi$, что соответствует $x = 1$ и $x = -1$. Таким образом, формула верна для $x \in (-1, 1)$.</p><p>Подставляя выражение для $\sin y$ в формулу для производной, получаем:</p><p>$\frac{dy}{dx} = (\arccos x)' = -\frac{1}{\sqrt{1 - x^2}}$</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$.</p><p><strong>в)</strong> Докажем формулу для производной арккотангенса: $(\text{arcctg } x)' = -\frac{1}{1+x^2}$.</p><p>Пусть $y = \text{arcctg } x$. По определению арккотангенса, это эквивалентно $x = \text{ctg } y$, где $x \in (-\infty, \infty)$ и $y \in (0, \pi)$.</p><p>Продифференцируем обе части равенства $x = \text{ctg } y$ по переменной $x$:</p><p>$\frac{d}{dx}(x) = \frac{d}{dx}(\text{ctg } y)$</p><p>Зная, что производная котангенса $(\text{ctg } y)'_y = -(1 + \text{ctg}^2 y)$, применяем правило дифференцирования сложной функции:</p><p>$1 = -(1 + \text{ctg}^2 y) \cdot \frac{dy}{dx}$</p><p>Выразим отсюда $\frac{dy}{dx}$:</p><p>$\frac{dy}{dx} = -\frac{1}{1 + \text{ctg}^2 y}$</p><p>Так как $x = \text{ctg } y$, мы можем подставить $x$ в это выражение:</p><p>$\frac{dy}{dx} = (\text{arcctg } x)' = -\frac{1}{1 + x^2}$</p><p>Эта формула верна для всех действительных чисел $x$, так как знаменатель $1+x^2$ никогда не равен нулю.</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> $(\text{arcctg } x)' = -\frac{1}{1+x^2}$.</p>"
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            "text" => "<p><strong>а)</strong> Докажем формулу для производной арксинуса: $(\arcsin x)' = \frac{1}{\sqrt{1-x^2}}$.</p><p>Пусть $y = \arcsin x$. По определению арксинуса, это эквивалентно $x = \sin y$, где $x \in [-1, 1]$ и $y \in [-\frac{\pi}{2}, \frac{\pi}{2}]$.</p><p>Для нахождения производной $\frac{dy}{dx}$ воспользуемся правилом дифференцирования обратной функции. Продифференцируем обе части равенства $x = \sin y$ по переменной $x$:</p><p>$\frac{d}{dx}(x) = \frac{d}{dx}(\sin y)$</p><p>Применяя правило дифференцирования сложной функции для правой части, получаем:</p><p>$1 = (\cos y) \cdot \frac{dy}{dx}$</p><p>Отсюда выразим $\frac{dy}{dx}$:</p><p>$\frac{dy}{dx} = \frac{1}{\cos y}$</p><p>Теперь нам нужно выразить $\cos y$ через $x$. Воспользуемся основным тригонометрическим тождеством: $\sin^2 y + \cos^2 y = 1$.</p><p>Отсюда $\cos^2 y = 1 - \sin^2 y$. Так как $x = \sin y$, то $\cos^2 y = 1 - x^2$.</p><p>Следовательно, $\cos y = \pm \sqrt{1 - x^2}$.</p><p>Чтобы выбрать правильный знак, рассмотрим область значений функции $y = \arcsin x$, которая является отрезком $[-\frac{\pi}{2}, \frac{\pi}{2}]$. На этом отрезке косинус неотрицателен, то есть $\cos y \ge 0$. Поэтому мы выбираем знак плюс:</p><p>$\cos y = \sqrt{1 - x^2}$</p><p>Заметим, что производная не определена, когда $\cos y = 0$, то есть при $y = \pm \frac{\pi}{2}$, что соответствует $x = \pm 1$. Таким образом, формула верна для $x \in (-1, 1)$.</p><p>Подставляя выражение для $\cos y$ в формулу для производной, получаем:</p><p>$\frac{dy}{dx} = (\arcsin x)' = \frac{1}{\sqrt{1 - x^2}}$</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> $(\arcsin x)' = \frac{1}{\sqrt{1-x^2}}$.</p><p><strong>б)</strong> Докажем формулу для производной арккосинуса: $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$.</p><p>Пусть $y = \arccos x$. По определению арккосинуса, это эквивалентно $x = \cos y$, где $x \in [-1, 1]$ и $y \in [0, \pi]$.</p><p>Продифференцируем обе части равенства $x = \cos y$ по переменной $x$:</p><p>$\frac{d}{dx}(x) = \frac{d}{dx}(\cos y)$</p><p>$1 = (-\sin y) \cdot \frac{dy}{dx}$</p><p>Выразим $\frac{dy}{dx}$:</p><p>$\frac{dy}{dx} = -\frac{1}{\sin y}$</p><p>Теперь выразим $\sin y$ через $x$. Из основного тригонометрического тождества $\sin^2 y + \cos^2 y = 1$ следует, что $\sin^2 y = 1 - \cos^2 y$.</p><p>Так как $x = \cos y$, получаем $\sin^2 y = 1 - x^2$.</p><p>Следовательно, $\sin y = \pm \sqrt{1 - x^2}$.</p><p>Область значений функции $y = \arccos x$ — это отрезок $[0, \pi]$. На этом отрезке синус неотрицателен, то есть $\sin y \ge 0$. Поэтому мы выбираем знак плюс:</p><p>$\sin y = \sqrt{1 - x^2}$</p><p>Производная не определена при $\sin y = 0$, то есть при $y = 0$ и $y = \pi$, что соответствует $x = 1$ и $x = -1$. Таким образом, формула верна для $x \in (-1, 1)$.</p><p>Подставляя выражение для $\sin y$ в формулу для производной, получаем:</p><p>$\frac{dy}{dx} = (\arccos x)' = -\frac{1}{\sqrt{1 - x^2}}$</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$.</p><p><strong>в)</strong> Докажем формулу для производной арккотангенса: $(\text{arcctg } x)' = -\frac{1}{1+x^2}$.</p><p>Пусть $y = \text{arcctg } x$. По определению арккотангенса, это эквивалентно $x = \text{ctg } y$, где $x \in (-\infty, \infty)$ и $y \in (0, \pi)$.</p><p>Продифференцируем обе части равенства $x = \text{ctg } y$ по переменной $x$:</p><p>$\frac{d}{dx}(x) = \frac{d}{dx}(\text{ctg } y)$</p><p>Зная, что производная котангенса $(\text{ctg } y)'_y = -(1 + \text{ctg}^2 y)$, применяем правило дифференцирования сложной функции:</p><p>$1 = -(1 + \text{ctg}^2 y) \cdot \frac{dy}{dx}$</p><p>Выразим отсюда $\frac{dy}{dx}$:</p><p>$\frac{dy}{dx} = -\frac{1}{1 + \text{ctg}^2 y}$</p><p>Так как $x = \text{ctg } y$, мы можем подставить $x$ в это выражение:</p><p>$\frac{dy}{dx} = (\text{arcctg } x)' = -\frac{1}{1 + x^2}$</p><p>Эта формула верна для всех действительных чисел $x$, так как знаменатель $1+x^2$ никогда не равен нулю.</p><p>Что и требовалось доказать.</p><p><strong>Ответ:</strong> $(\text{arcctg } x)' = -\frac{1}{1+x^2}$.</p>"
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№3 (с. 40)
Условие. №3 (с. 40)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Пак Олег Владимирович, Ардакулы Дархан, Ескендирова Елена Викторовна, издательство Алматыкітап баспасы, Алматы, 2019, Часть 2, страница 40, номер 3, Условие

Упражнение 3

Докажите, что: а) $(\arcsin)' = \frac{1}{\sqrt{1-x^2}}$; б) $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$ (формула 9); в) $(\operatorname{arcctg} x)' = -\frac{1}{1+x^2}$ (формула 11).

Поскольку правило дифференцирования сложной функции мы уже обсудили, то формулы 3-11 из второй колонки таблицы можно считать доказанными. Приведем несколько примеров их применения.

Решение 2 (rus). №3 (с. 40)

а) Докажем формулу для производной арксинуса: $(\arcsin x)' = \frac{1}{\sqrt{1-x^2}}$.

Пусть $y = \arcsin x$. По определению арксинуса, это эквивалентно $x = \sin y$, где $x \in [-1, 1]$ и $y \in [-\frac{\pi}{2}, \frac{\pi}{2}]$.

Для нахождения производной $\frac{dy}{dx}$ воспользуемся правилом дифференцирования обратной функции. Продифференцируем обе части равенства $x = \sin y$ по переменной $x$:

$\frac{d}{dx}(x) = \frac{d}{dx}(\sin y)$

Применяя правило дифференцирования сложной функции для правой части, получаем:

$1 = (\cos y) \cdot \frac{dy}{dx}$

Отсюда выразим $\frac{dy}{dx}$:

$\frac{dy}{dx} = \frac{1}{\cos y}$

Теперь нам нужно выразить $\cos y$ через $x$. Воспользуемся основным тригонометрическим тождеством: $\sin^2 y + \cos^2 y = 1$.

Отсюда $\cos^2 y = 1 - \sin^2 y$. Так как $x = \sin y$, то $\cos^2 y = 1 - x^2$.

Следовательно, $\cos y = \pm \sqrt{1 - x^2}$.

Чтобы выбрать правильный знак, рассмотрим область значений функции $y = \arcsin x$, которая является отрезком $[-\frac{\pi}{2}, \frac{\pi}{2}]$. На этом отрезке косинус неотрицателен, то есть $\cos y \ge 0$. Поэтому мы выбираем знак плюс:

$\cos y = \sqrt{1 - x^2}$

Заметим, что производная не определена, когда $\cos y = 0$, то есть при $y = \pm \frac{\pi}{2}$, что соответствует $x = \pm 1$. Таким образом, формула верна для $x \in (-1, 1)$.

Подставляя выражение для $\cos y$ в формулу для производной, получаем:

$\frac{dy}{dx} = (\arcsin x)' = \frac{1}{\sqrt{1 - x^2}}$

Что и требовалось доказать.

Ответ: $(\arcsin x)' = \frac{1}{\sqrt{1-x^2}}$.

б) Докажем формулу для производной арккосинуса: $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$.

Пусть $y = \arccos x$. По определению арккосинуса, это эквивалентно $x = \cos y$, где $x \in [-1, 1]$ и $y \in [0, \pi]$.

Продифференцируем обе части равенства $x = \cos y$ по переменной $x$:

$\frac{d}{dx}(x) = \frac{d}{dx}(\cos y)$

$1 = (-\sin y) \cdot \frac{dy}{dx}$

Выразим $\frac{dy}{dx}$:

$\frac{dy}{dx} = -\frac{1}{\sin y}$

Теперь выразим $\sin y$ через $x$. Из основного тригонометрического тождества $\sin^2 y + \cos^2 y = 1$ следует, что $\sin^2 y = 1 - \cos^2 y$.

Так как $x = \cos y$, получаем $\sin^2 y = 1 - x^2$.

Следовательно, $\sin y = \pm \sqrt{1 - x^2}$.

Область значений функции $y = \arccos x$ — это отрезок $[0, \pi]$. На этом отрезке синус неотрицателен, то есть $\sin y \ge 0$. Поэтому мы выбираем знак плюс:

$\sin y = \sqrt{1 - x^2}$

Производная не определена при $\sin y = 0$, то есть при $y = 0$ и $y = \pi$, что соответствует $x = 1$ и $x = -1$. Таким образом, формула верна для $x \in (-1, 1)$.

Подставляя выражение для $\sin y$ в формулу для производной, получаем:

$\frac{dy}{dx} = (\arccos x)' = -\frac{1}{\sqrt{1 - x^2}}$

Что и требовалось доказать.

Ответ: $(\arccos x)' = -\frac{1}{\sqrt{1-x^2}}$.

в) Докажем формулу для производной арккотангенса: $(\text{arcctg } x)' = -\frac{1}{1+x^2}$.

Пусть $y = \text{arcctg } x$. По определению арккотангенса, это эквивалентно $x = \text{ctg } y$, где $x \in (-\infty, \infty)$ и $y \in (0, \pi)$.

Продифференцируем обе части равенства $x = \text{ctg } y$ по переменной $x$:

$\frac{d}{dx}(x) = \frac{d}{dx}(\text{ctg } y)$

Зная, что производная котангенса $(\text{ctg } y)'_y = -(1 + \text{ctg}^2 y)$, применяем правило дифференцирования сложной функции:

$1 = -(1 + \text{ctg}^2 y) \cdot \frac{dy}{dx}$

Выразим отсюда $\frac{dy}{dx}$:

$\frac{dy}{dx} = -\frac{1}{1 + \text{ctg}^2 y}$

Так как $x = \text{ctg } y$, мы можем подставить $x$ в это выражение:

$\frac{dy}{dx} = (\text{arcctg } x)' = -\frac{1}{1 + x^2}$

Эта формула верна для всех действительных чисел $x$, так как знаменатель $1+x^2$ никогда не равен нулю.

Что и требовалось доказать.

Ответ: $(\text{arcctg } x)' = -\frac{1}{1+x^2}$.

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