Номер 10, страница 45, 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. Задачи - номер 10, страница 45.

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                    "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"
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                    "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: []
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                  #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
            }
            "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_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
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          #attributes: array:24 [
            "id" => 1119427
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
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            "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
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                  ]
                  #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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                  #attributeCastCache: []
                  #dateFormat: null
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                  #dispatchesEvents: []
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                  +timestamps: true
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                    0 => "*"
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                }
              ]
              #escapeWhenCastingToString: false
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            "field_page_start" => "5"
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            "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: []
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                  #attributes: array:50 [
                    "id" => 4295
                    "created_at" => "2026-04-10 13:58:26"
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                    "field_subject" => Illuminate\Database\Eloquent\Collection {#1109 …2}
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                    "field_author" => Illuminate\Database\Eloquent\Collection {#1115 …2}
                    "field_author_foreign" => Illuminate\Database\Eloquent\Collection {#1119 …2}
                    "field_book_type" => Illuminate\Database\Eloquent\Collection {#1120 …2}
                    "field_country" => Illuminate\Database\Eloquent\Collection {#1122 …2}
                    "field_city" => Illuminate\Database\Eloquent\Collection {#1124 …2}
                    "field_series" => Illuminate\Database\Eloquent\Collection {#1126 …2}
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                    "field_standart_of_education" => Illuminate\Database\Eloquent\Collection {#1129 …2}
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                    "field_default_folder" => "/algebra_10/baspasy-u19/"
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                    "field_cover" => array:1 [ …1]
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                    "field_cover" => array:1 [ …1]
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                    "field_cover_color" => Illuminate\Database\Eloquent\Collection {#1135 …2}
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                0 => App\Models\Branch {#1137
                  #connection: "mysql"
                  #table: "branches"
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                    "field_url" => null
                    "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1138 …2}
                    "field_page_start" => "5"
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                    "field_branch_expanded" => "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"
                     …22
                  ]
                  #changes: []
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                  #attributeCastCache: []
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                  +timestamps: true
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                  #hidden: []
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                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
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          ]
          #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}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1136}
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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
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          #attributes: array:24 [
            "id" => 1119431
            "created_at" => "2026-04-10 13:58:26"
            "updated_at" => null
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            "field_branch_order" => "2"
            "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 [ …7]
                  #original: array:7 [ …7]
                  #changes: []
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                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "field_page_start" => "25"
            "field_branch_display" => "0"
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            "field_display_branch_in_title" => "1"
            "field_display_task_interval" => "0"
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            "field_branch_title_in_content" => "0"
            "field_navigation_title" => null
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            "field_metatags_description" => null
            "field_h1" => null
            "field_description_top" => null
            "field_description_bottom" => null
            "field_branch_cover" => []
            "field_branch_covers" => []
            "book" => Illuminate\Database\Eloquent\Collection {#1145
              #items: array:1 [
                0 => App\Models\Book {#1146
                  #connection: "mysql"
                  #table: "books"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: false
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:50 [ …50]
                  #original: array:50 [ …50]
                  #changes: []
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                  #attributeCastCache: []
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                  #touches: []
                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1174
              #items: array:1 [
                0 => App\Models\Branch {#1175
                  #connection: "mysql"
                  #table: "branches"
                  #primaryKey: "id"
                  #keyType: "int"
                  +incrementing: true
                  #with: []
                  #withCount: []
                  +preventsLazyLoading: false
                  #perPage: 15
                  +exists: true
                  +wasRecentlyCreated: false
                  #escapeWhenCastingToString: false
                  #attributes: array:24 [ …24]
                  #original: array:24 [ …24]
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                  #attributeCastCache: []
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                  +timestamps: true
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                  #hidden: []
                  #visible: []
                  #fillable: []
                  #guarded: array:1 [ …1]
                }
              ]
              #escapeWhenCastingToString: false
            }
          ]
          #original: array:24 [
            "id" => 1119431
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            "updated_at" => null
            "field_display_title" => "Понятие производной"
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            "field_url" => null
            "field_branch_type" => Illuminate\Database\Eloquent\Collection {#1143}
            "field_page_start" => "25"
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            "field_branch_title_in_content" => "0"
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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 {#1145}
            "branch_parent" => Illuminate\Database\Eloquent\Collection {#1174}
          ]
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    "content" => Illuminate\Database\Eloquent\Collection {#1423
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            "id" => 1300891
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            "edition" => Illuminate\Database\Eloquent\Collection {#1443
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                0 => App\Models\Edition {#1435
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            "text" => "<p><strong>10.</strong> Решите следующие неравенства:</p><p><strong>а)</strong> $f'(x) &gt; \frac{1}{2(x-1)}$, если $f(x) = -\frac{1}{x-1}$;</p><p><strong>б)</strong> $f'(x) \leq \frac{4}{3(x^2-1)}$, если $f(x) = -\frac{1}{x^2-1}$.</p>"
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            "text" => "<p><strong>10.</strong> Решите следующие неравенства:</p><p><strong>а)</strong> $f'(x) &gt; \frac{1}{2(x-1)}$, если $f(x) = -\frac{1}{x-1}$;</p><p><strong>б)</strong> $f'(x) \leq \frac{4}{3(x^2-1)}$, если $f(x) = -\frac{1}{x^2-1}$.</p>"
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        }
        1 => App\Models\Element {#1441
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            "created_at" => "2026-04-10 13:58:26"
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            "edition" => Illuminate\Database\Eloquent\Collection {#1451
              #items: array:1 [
                0 => App\Models\Edition {#1442
                  #connection: "mysql"
                  #table: "editions"
                  #primaryKey: "id"
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                  +exists: true
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                  #attributes: array:21 [ …21]
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            "text" => "<p><strong>a)</strong></p><p>1. Найдём производную функции $f(x) = -\frac{1}{x-1}$.</p><p>Для удобства представим функцию в виде $f(x) = -(x-1)^{-1}$. Используя правило дифференцирования степенной функции $(u^n)' = n \cdot u^{n-1} \cdot u'$, получаем:</p><p>$f'(x) = -(-1) \cdot (x-1)^{-1-1} \cdot (x-1)' = 1 \cdot (x-1)^{-2} \cdot 1 = \frac{1}{(x-1)^2}$.</p><p>2. Подставим найденную производную в исходное неравенство $f'(x) > \frac{1}{2(x-1)}$:</p><p>$\frac{1}{(x-1)^2} > \frac{1}{2(x-1)}$.</p><p>3. Решим полученное неравенство. Область допустимых значений (ОДЗ) определяется условием, что знаменатели не равны нулю: $x-1 \neq 0$, то есть $x \neq 1$.</p><p>Перенесём все члены неравенства в левую часть и приведём их к общему знаменателю $2(x-1)^2$:</p><p>$\frac{1}{(x-1)^2} - \frac{1}{2(x-1)} > 0$</p><p>$\frac{2 \cdot 1 - 1 \cdot (x-1)}{2(x-1)^2} > 0$</p><p>$\frac{2 - x + 1}{2(x-1)^2} > 0$</p><p>$\frac{3 - x}{2(x-1)^2} > 0$.</p><p>Знаменатель $2(x-1)^2$ всегда положителен при любом $x$ из ОДЗ ($x \neq 1$). Следовательно, знак дроби зависит только от знака числителя. Неравенство равносильно системе:</p><p>$\begin{cases} 3 - x > 0 \\ x \neq 1 \end{cases}$</p><p>Из первого неравенства получаем $x < 3$. Объединяя с условием $x \neq 1$, получаем окончательное решение.</p><p><strong>Ответ:</strong> $x \in (-\infty; 1) \cup (1; 3)$.</p><p><strong>б)</strong></p><p>1. Найдём производную функции $f(x) = -\frac{1}{x^2-1}$.</p><p>Представим функцию в виде $f(x) = -(x^2-1)^{-1}$. Используя правило дифференцирования сложной функции, получаем:</p><p>$f'(x) = -(-1) \cdot (x^2-1)^{-1-1} \cdot (x^2-1)' = (x^2-1)^{-2} \cdot 2x = \frac{2x}{(x^2-1)^2}$.</p><p>2. Подставим производную в неравенство $f'(x) \leq \frac{4}{3(x^2-1)}$:</p><p>$\frac{2x}{(x^2-1)^2} \leq \frac{4}{3(x^2-1)}$.</p><p>3. Решим это неравенство. ОДЗ: $x^2-1 \neq 0$, что означает $x \neq 1$ и $x \neq -1$.</p><p>Перенесём все члены в левую часть и приведём к общему знаменателю $3(x^2-1)^2$:</p><p>$\frac{2x}{(x^2-1)^2} - \frac{4}{3(x^2-1)} \leq 0$</p><p>$\frac{3 \cdot 2x - 4 \cdot (x^2-1)}{3(x^2-1)^2} \leq 0$</p><p>$\frac{6x - 4x^2 + 4}{3(x^2-1)^2} \leq 0$.</p><p>Знаменатель $3(x^2-1)^2$ положителен при всех $x$ из ОДЗ. Таким образом, знак дроби определяется знаком числителя:</p><p>$-4x^2 + 6x + 4 \leq 0$.</p><p>Разделим обе части на -2, изменив знак неравенства на противоположный:</p><p>$2x^2 - 3x - 2 \geq 0$.</p><p>Для решения этого квадратного неравенства найдём корни уравнения $2x^2 - 3x - 2 = 0$.</p><p>Дискриминант $D = (-3)^2 - 4 \cdot 2 \cdot (-2) = 9 + 16 = 25$.</p><p>Корни: $x_1 = \frac{3 - \sqrt{25}}{2 \cdot 2} = \frac{3-5}{4} = -0.5$; $x_2 = \frac{3 + \sqrt{25}}{2 \cdot 2} = \frac{3+5}{4} = 2$.</p><p>График функции $y=2x^2 - 3x - 2$ — это парабола с ветвями вверх. Значения функции неотрицательны при $x \leq -0.5$ и при $x \geq 2$. Таким образом, решение неравенства $2x^2 - 3x - 2 \geq 0$ есть $x \in (-\infty; -0.5] \cup [2; \infty)$.</p><p>Теперь учтём ОДЗ ($x \neq \pm 1$). Точка $x=-1$ попадает в промежуток $(-\infty; -0.5]$, поэтому её нужно исключить. Точка $x=1$ не входит в найденное решение.</p><p>Итоговое решение:</p><p><strong>Ответ:</strong> $x \in (-\infty; -1) \cup (-1; -0.5] \cup [2; \infty)$.</p>"
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            "text" => "<p><strong>a)</strong></p><p>1. Найдём производную функции $f(x) = -\frac{1}{x-1}$.</p><p>Для удобства представим функцию в виде $f(x) = -(x-1)^{-1}$. Используя правило дифференцирования степенной функции $(u^n)' = n \cdot u^{n-1} \cdot u'$, получаем:</p><p>$f'(x) = -(-1) \cdot (x-1)^{-1-1} \cdot (x-1)' = 1 \cdot (x-1)^{-2} \cdot 1 = \frac{1}{(x-1)^2}$.</p><p>2. Подставим найденную производную в исходное неравенство $f'(x) > \frac{1}{2(x-1)}$:</p><p>$\frac{1}{(x-1)^2} > \frac{1}{2(x-1)}$.</p><p>3. Решим полученное неравенство. Область допустимых значений (ОДЗ) определяется условием, что знаменатели не равны нулю: $x-1 \neq 0$, то есть $x \neq 1$.</p><p>Перенесём все члены неравенства в левую часть и приведём их к общему знаменателю $2(x-1)^2$:</p><p>$\frac{1}{(x-1)^2} - \frac{1}{2(x-1)} > 0$</p><p>$\frac{2 \cdot 1 - 1 \cdot (x-1)}{2(x-1)^2} > 0$</p><p>$\frac{2 - x + 1}{2(x-1)^2} > 0$</p><p>$\frac{3 - x}{2(x-1)^2} > 0$.</p><p>Знаменатель $2(x-1)^2$ всегда положителен при любом $x$ из ОДЗ ($x \neq 1$). Следовательно, знак дроби зависит только от знака числителя. Неравенство равносильно системе:</p><p>$\begin{cases} 3 - x > 0 \\ x \neq 1 \end{cases}$</p><p>Из первого неравенства получаем $x < 3$. Объединяя с условием $x \neq 1$, получаем окончательное решение.</p><p><strong>Ответ:</strong> $x \in (-\infty; 1) \cup (1; 3)$.</p><p><strong>б)</strong></p><p>1. Найдём производную функции $f(x) = -\frac{1}{x^2-1}$.</p><p>Представим функцию в виде $f(x) = -(x^2-1)^{-1}$. Используя правило дифференцирования сложной функции, получаем:</p><p>$f'(x) = -(-1) \cdot (x^2-1)^{-1-1} \cdot (x^2-1)' = (x^2-1)^{-2} \cdot 2x = \frac{2x}{(x^2-1)^2}$.</p><p>2. Подставим производную в неравенство $f'(x) \leq \frac{4}{3(x^2-1)}$:</p><p>$\frac{2x}{(x^2-1)^2} \leq \frac{4}{3(x^2-1)}$.</p><p>3. Решим это неравенство. ОДЗ: $x^2-1 \neq 0$, что означает $x \neq 1$ и $x \neq -1$.</p><p>Перенесём все члены в левую часть и приведём к общему знаменателю $3(x^2-1)^2$:</p><p>$\frac{2x}{(x^2-1)^2} - \frac{4}{3(x^2-1)} \leq 0$</p><p>$\frac{3 \cdot 2x - 4 \cdot (x^2-1)}{3(x^2-1)^2} \leq 0$</p><p>$\frac{6x - 4x^2 + 4}{3(x^2-1)^2} \leq 0$.</p><p>Знаменатель $3(x^2-1)^2$ положителен при всех $x$ из ОДЗ. Таким образом, знак дроби определяется знаком числителя:</p><p>$-4x^2 + 6x + 4 \leq 0$.</p><p>Разделим обе части на -2, изменив знак неравенства на противоположный:</p><p>$2x^2 - 3x - 2 \geq 0$.</p><p>Для решения этого квадратного неравенства найдём корни уравнения $2x^2 - 3x - 2 = 0$.</p><p>Дискриминант $D = (-3)^2 - 4 \cdot 2 \cdot (-2) = 9 + 16 = 25$.</p><p>Корни: $x_1 = \frac{3 - \sqrt{25}}{2 \cdot 2} = \frac{3-5}{4} = -0.5$; $x_2 = \frac{3 + \sqrt{25}}{2 \cdot 2} = \frac{3+5}{4} = 2$.</p><p>График функции $y=2x^2 - 3x - 2$ — это парабола с ветвями вверх. Значения функции неотрицательны при $x \leq -0.5$ и при $x \geq 2$. Таким образом, решение неравенства $2x^2 - 3x - 2 \geq 0$ есть $x \in (-\infty; -0.5] \cup [2; \infty)$.</p><p>Теперь учтём ОДЗ ($x \neq \pm 1$). Точка $x=-1$ попадает в промежуток $(-\infty; -0.5]$, поэтому её нужно исключить. Точка $x=1$ не входит в найденное решение.</p><p>Итоговое решение:</p><p><strong>Ответ:</strong> $x \in (-\infty; -1) \cup (-1; -0.5] \cup [2; \infty)$.</p>"
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№10 (с. 45)
Условие. №10 (с. 45)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Пак Олег Владимирович, Ардакулы Дархан, Ескендирова Елена Викторовна, издательство Алматыкітап баспасы, Алматы, 2019, Часть 2, страница 45, номер 10, Условие

10. Решите следующие неравенства:

а) $f'(x) > \frac{1}{2(x-1)}$, если $f(x) = -\frac{1}{x-1}$;

б) $f'(x) \leq \frac{4}{3(x^2-1)}$, если $f(x) = -\frac{1}{x^2-1}$.

Решение 2 (rus). №10 (с. 45)

a)

1. Найдём производную функции $f(x) = -\frac{1}{x-1}$.

Для удобства представим функцию в виде $f(x) = -(x-1)^{-1}$. Используя правило дифференцирования степенной функции $(u^n)' = n \cdot u^{n-1} \cdot u'$, получаем:

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

2. Подставим найденную производную в исходное неравенство $f'(x) > \frac{1}{2(x-1)}$:

$\frac{1}{(x-1)^2} > \frac{1}{2(x-1)}$.

3. Решим полученное неравенство. Область допустимых значений (ОДЗ) определяется условием, что знаменатели не равны нулю: $x-1 \neq 0$, то есть $x \neq 1$.

Перенесём все члены неравенства в левую часть и приведём их к общему знаменателю $2(x-1)^2$:

$\frac{1}{(x-1)^2} - \frac{1}{2(x-1)} > 0$

$\frac{2 \cdot 1 - 1 \cdot (x-1)}{2(x-1)^2} > 0$

$\frac{2 - x + 1}{2(x-1)^2} > 0$

$\frac{3 - x}{2(x-1)^2} > 0$.

Знаменатель $2(x-1)^2$ всегда положителен при любом $x$ из ОДЗ ($x \neq 1$). Следовательно, знак дроби зависит только от знака числителя. Неравенство равносильно системе:

$\begin{cases} 3 - x > 0 \\ x \neq 1 \end{cases}$

Из первого неравенства получаем $x < 3$. Объединяя с условием $x \neq 1$, получаем окончательное решение.

Ответ: $x \in (-\infty; 1) \cup (1; 3)$.

б)

1. Найдём производную функции $f(x) = -\frac{1}{x^2-1}$.

Представим функцию в виде $f(x) = -(x^2-1)^{-1}$. Используя правило дифференцирования сложной функции, получаем:

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

2. Подставим производную в неравенство $f'(x) \leq \frac{4}{3(x^2-1)}$:

$\frac{2x}{(x^2-1)^2} \leq \frac{4}{3(x^2-1)}$.

3. Решим это неравенство. ОДЗ: $x^2-1 \neq 0$, что означает $x \neq 1$ и $x \neq -1$.

Перенесём все члены в левую часть и приведём к общему знаменателю $3(x^2-1)^2$:

$\frac{2x}{(x^2-1)^2} - \frac{4}{3(x^2-1)} \leq 0$

$\frac{3 \cdot 2x - 4 \cdot (x^2-1)}{3(x^2-1)^2} \leq 0$

$\frac{6x - 4x^2 + 4}{3(x^2-1)^2} \leq 0$.

Знаменатель $3(x^2-1)^2$ положителен при всех $x$ из ОДЗ. Таким образом, знак дроби определяется знаком числителя:

$-4x^2 + 6x + 4 \leq 0$.

Разделим обе части на -2, изменив знак неравенства на противоположный:

$2x^2 - 3x - 2 \geq 0$.

Для решения этого квадратного неравенства найдём корни уравнения $2x^2 - 3x - 2 = 0$.

Дискриминант $D = (-3)^2 - 4 \cdot 2 \cdot (-2) = 9 + 16 = 25$.

Корни: $x_1 = \frac{3 - \sqrt{25}}{2 \cdot 2} = \frac{3-5}{4} = -0.5$; $x_2 = \frac{3 + \sqrt{25}}{2 \cdot 2} = \frac{3+5}{4} = 2$.

График функции $y=2x^2 - 3x - 2$ — это парабола с ветвями вверх. Значения функции неотрицательны при $x \leq -0.5$ и при $x \geq 2$. Таким образом, решение неравенства $2x^2 - 3x - 2 \geq 0$ есть $x \in (-\infty; -0.5] \cup [2; \infty)$.

Теперь учтём ОДЗ ($x \neq \pm 1$). Точка $x=-1$ попадает в промежуток $(-\infty; -0.5]$, поэтому её нужно исключить. Точка $x=1$ не входит в найденное решение.

Итоговое решение:

Ответ: $x \in (-\infty; -1) \cup (-1; -0.5] \cup [2; \infty)$.

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