Номер 11, страница 123 - гдз по алгебре 10 класс учебник Абылкасымова, Жумагулова

Алгебра, 10 класс Учебник, авторы: Абылкасымова Алма Есимбековна, Жумагулова Зауре Абдыкеновна, издательство Мектеп, Алматы, 2019

Авторы: Абылкасымова А. Е., Жумагулова З. А.

Тип: Учебник

Издательство: Мектеп

Год издания: 2019 - 2026

ISBN: 978-601-07-1142-6

Утверждено Министерством образования и науки Республики Казахстан

Глава 6. Применение производной. Проверь себя! - номер 11, страница 123.

App\Models\Task {#1030 // resources/views/models/task/default.blade.php
  #connection: "mysql"
  #table: "tasks"
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  #attributes: array:24 [
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    "field_url" => "/10-klass/algebra/abylkasymova-uchebnik/prceb122-11"
    "field_display_title" => "11"
    "field_outside_task" => null
    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1037
      #items: array:1 [
        0 => App\Models\Term {#1036
          #connection: "mysql"
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                0 => App\Models\Book {#1057
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                            "id" => 6471
                            "created_at" => "2026-04-10 13:58:26"
                            "updated_at" => null
                            "name" => "Алгебра"
                            "field_abbreviated_name" => null
                            "field_cases" => array:6 [
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                    "field_class" => Illuminate\Database\Eloquent\Collection {#1064
                      #items: array:1 [
                        0 => App\Models\Term {#1061
                          #connection: "mysql"
                          #table: "terms"
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                            "created_at" => "2026-04-10 13:58:26"
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                        0 => App\Models\Term {#1063
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                    "field_author" => Illuminate\Database\Eloquent\Collection {#1060
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                        0 => App\Models\Term {#1075
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                        1 => App\Models\Term {#1076
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            "text" => "<p>Для нахождения точки минимума функции $f(x) = x^2 - 1$ можно воспользоваться одним из двух способов.</p><p><strong>Способ 1: через производную</strong></p><p>Точка минимума является стационарной точкой, в которой производная функции равна нулю и при переходе через которую производная меняет знак с минуса на плюс.</p><p><strong>1.</strong> Находим производную функции $f(x)$:</p><p>$f'(x) = (x^2 - 1)' = 2x$.</p><p><strong>2.</strong> Приравниваем производную к нулю, чтобы найти стационарные точки:</p><p>$2x = 0$</p><p>$x = 0$</p><p><strong>3.</strong> Проверяем знак производной в окрестности точки $x=0$.</p><p>При $x &lt; 0$, производная $f'(x) = 2x &lt; 0$ (функция убывает).</p><p>При $x &gt; 0$, производная $f'(x) = 2x &gt; 0$ (функция возрастает).</p><p>Поскольку знак производной меняется с «-» на «+», точка $x=0$ является точкой минимума.</p><p><strong>Способ 2: через свойства параболы</strong></p><p>Функция $f(x) = x^2 - 1$ является квадратичной функцией вида $y = ax^2 + bx + c$, где $a=1$, $b=0$, $c=-1$.</p><p>Графиком этой функции является парабола. Так как коэффициент $a=1$ положителен, ветви параболы направлены вверх. Следовательно, функция имеет точку минимума, которая совпадает с вершиной параболы.</p><p>Координата $x$ вершины параболы вычисляется по формуле:</p><p>$x_{вершины} = -\frac{b}{2a}$</p><p>Подставляем значения коэффициентов $a$ и $b$:</p><p>$x_{min} = -\frac{0}{2 \cdot 1} = 0$.</p><p>Оба способа показывают, что точка минимума функции $f(x) = x^2 - 1$ равна $x=0$. Этот результат соответствует варианту D).</p><p><strong>Ответ:</strong> D) $x_{min} = 0$.</p>"
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            "text" => "<p>Для нахождения точки минимума функции $f(x) = x^2 - 1$ можно воспользоваться одним из двух способов.</p><p><strong>Способ 1: через производную</strong></p><p>Точка минимума является стационарной точкой, в которой производная функции равна нулю и при переходе через которую производная меняет знак с минуса на плюс.</p><p><strong>1.</strong> Находим производную функции $f(x)$:</p><p>$f'(x) = (x^2 - 1)' = 2x$.</p><p><strong>2.</strong> Приравниваем производную к нулю, чтобы найти стационарные точки:</p><p>$2x = 0$</p><p>$x = 0$</p><p><strong>3.</strong> Проверяем знак производной в окрестности точки $x=0$.</p><p>При $x &lt; 0$, производная $f'(x) = 2x &lt; 0$ (функция убывает).</p><p>При $x &gt; 0$, производная $f'(x) = 2x &gt; 0$ (функция возрастает).</p><p>Поскольку знак производной меняется с «-» на «+», точка $x=0$ является точкой минимума.</p><p><strong>Способ 2: через свойства параболы</strong></p><p>Функция $f(x) = x^2 - 1$ является квадратичной функцией вида $y = ax^2 + bx + c$, где $a=1$, $b=0$, $c=-1$.</p><p>Графиком этой функции является парабола. Так как коэффициент $a=1$ положителен, ветви параболы направлены вверх. Следовательно, функция имеет точку минимума, которая совпадает с вершиной параболы.</p><p>Координата $x$ вершины параболы вычисляется по формуле:</p><p>$x_{вершины} = -\frac{b}{2a}$</p><p>Подставляем значения коэффициентов $a$ и $b$:</p><p>$x_{min} = -\frac{0}{2 \cdot 1} = 0$.</p><p>Оба способа показывают, что точка минимума функции $f(x) = x^2 - 1$ равна $x=0$. Этот результат соответствует варианту D).</p><p><strong>Ответ:</strong> D) $x_{min} = 0$.</p>"
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                    "book" => Illuminate\Database\Eloquent\Collection {#1227}
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                    0 => "*"
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                }
                1 => App\Models\Task {#1220
                  #connection: "mysql"
                  #table: "tasks"
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                    "top_parent_branch" => Illuminate\Database\Eloquent\Collection {#1228
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                      #escapeWhenCastingToString: false
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                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1224
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                       …1
                    }
                    "content" => Illuminate\Database\Eloquent\Collection {#1222 …2}
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                }
                2 => App\Models\Task {#1223
                  #connection: "mysql"
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                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1239 …2}
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                }
                3 => App\Models\Task {#1241
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
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                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1240 …2}
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                4 => App\Models\Task {#1246
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
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                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1243 …2}
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                    "edition_groups" => Illuminate\Database\Eloquent\Collection {#1261 …2}
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                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1259 …2}
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                    "book" => Illuminate\Database\Eloquent\Collection {#1276 …2}
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                5 => App\Models\Task {#1260
                  #connection: "mysql"
                  #table: "tasks"
                  #primaryKey: "id"
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                  #escapeWhenCastingToString: false
                  #attributes: array:24 [
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                    "created_at" => "2026-04-10 13:58:26"
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                    "field_display_title" => "15"
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                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1257 …2}
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                    "parent_branches" => Illuminate\Database\Eloquent\Collection {#1273 …2}
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                    "book" => Illuminate\Database\Eloquent\Collection {#1290 …2}
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                    0 => "*"
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                6 => App\Models\Task {#1274
                  #connection: "mysql"
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                    "field_display_title" => "16"
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                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1271 …2}
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                7 => App\Models\Task {#1288
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                    "field_task_type" => Illuminate\Database\Eloquent\Collection {#1285 …2}
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№11 (с. 123)
Условие. №11 (с. 123)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Абылкасымова Алма Есимбековна, Жумагулова Зауре Абдыкеновна, издательство Мектеп, Алматы, 2019, страница 123, номер 11, Условие

11. Найдите точку минимума функции $f(x) = x^2 - 1$:

A) $x_{\text{min}} = -3$; B) $x_{\text{min}} = -1$; C) $x_{\text{min}} = 1$; D) $x_{\text{min}} = 0$.

Решение. №11 (с. 123)
Алгебра, 10 класс Учебник, авторы: Абылкасымова Алма Есимбековна, Жумагулова Зауре Абдыкеновна, издательство Мектеп, Алматы, 2019, страница 123, номер 11, Решение
Решение 2. №11 (с. 123)

Для нахождения точки минимума функции $f(x) = x^2 - 1$ можно воспользоваться одним из двух способов.

Способ 1: через производную

Точка минимума является стационарной точкой, в которой производная функции равна нулю и при переходе через которую производная меняет знак с минуса на плюс.

1. Находим производную функции $f(x)$:

$f'(x) = (x^2 - 1)' = 2x$.

2. Приравниваем производную к нулю, чтобы найти стационарные точки:

$2x = 0$

$x = 0$

3. Проверяем знак производной в окрестности точки $x=0$.

При $x < 0$, производная $f'(x) = 2x < 0$ (функция убывает).

При $x > 0$, производная $f'(x) = 2x > 0$ (функция возрастает).

Поскольку знак производной меняется с «-» на «+», точка $x=0$ является точкой минимума.

Способ 2: через свойства параболы

Функция $f(x) = x^2 - 1$ является квадратичной функцией вида $y = ax^2 + bx + c$, где $a=1$, $b=0$, $c=-1$.

Графиком этой функции является парабола. Так как коэффициент $a=1$ положителен, ветви параболы направлены вверх. Следовательно, функция имеет точку минимума, которая совпадает с вершиной параболы.

Координата $x$ вершины параболы вычисляется по формуле:

$x_{вершины} = -\frac{b}{2a}$

Подставляем значения коэффициентов $a$ и $b$:

$x_{min} = -\frac{0}{2 \cdot 1} = 0$.

Оба способа показывают, что точка минимума функции $f(x) = x^2 - 1$ равна $x=0$. Этот результат соответствует варианту D).

Ответ: D) $x_{min} = 0$.

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