Номер 16.7, страница 96 - 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 5. Производная. Параграф 16. Производная сложной функции - номер 16.7, страница 96.

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            "text" => "<p><strong>а)</strong> Для нахождения производной функции $f(x) = \left(4 + \frac{1}{x^2}\right)^3$ воспользуемся правилом дифференцирования сложной функции (цепным правилом): $(u(v(x)))' = u'(v(x)) \cdot v'(x)$. В данном случае, внешняя функция — это степенная функция $u(v) = v^3$, а внутренняя функция — $v(x) = 4 + \frac{1}{x^2}$.</p><p><strong>1.</strong> Найдём производную внешней функции: $u'(v) = (v^3)' = 3v^2$.</p><p><strong>2.</strong> Найдём производную внутренней функции. Для удобства представим $\frac{1}{x^2}$ как $x^{-2}$:</p><p>$v'(x) = \left(4 + \frac{1}{x^2}\right)' = (4 + x^{-2})' = (4)' + (x^{-2})'$.</p><p>Производная константы равна нулю: $(4)'=0$.</p><p>Производная степенной функции $(x^n)'=nx^{n-1}$: $(x^{-2})' = -2x^{-2-1} = -2x^{-3} = -\frac{2}{x^3}$.</p><p>Таким образом, $v'(x) = 0 - \frac{2}{x^3} = -\frac{2}{x^3}$.</p><p><strong>3.</strong> Теперь подставим всё в формулу производной сложной функции:</p><p>$f'(x) = 3\left(4 + \frac{1}{x^2}\right)^2 \cdot \left(-\frac{2}{x^3}\right)$.</p><p><strong>4.</strong> Упростим полученное выражение:</p><p>$f'(x) = -\frac{6}{x^3}\left(4 + \frac{1}{x^2}\right)^2$.</p><p><strong>Ответ:</strong> $f'(x) = -\frac{6}{x^3}\left(4 + \frac{1}{x^2}\right)^2$.</p><p><strong>б)</strong> Для нахождения производной функции $f(x) = \left(5 - \frac{4}{x}\right)^2$ также используем правило дифференцирования сложной функции. Здесь внешняя функция — $u(v) = v^2$, а внутренняя — $v(x) = 5 - \frac{4}{x}$.</p><p><strong>1.</strong> Найдём производную внешней функции: $u'(v) = (v^2)' = 2v$.</p><p><strong>2.</strong> Найдём производную внутренней функции. Представим $\frac{4}{x}$ как $4x^{-1}$:</p><p>$v'(x) = \left(5 - \frac{4}{x}\right)' = (5 - 4x^{-1})' = (5)' - (4x^{-1})'$.</p><p>Производная константы $(5)'=0$.</p><p>Производная $4x^{-1}$: $(4x^{-1})' = 4 \cdot (-1)x^{-1-1} = -4x^{-2} = -\frac{4}{x^2}$.</p><p>Таким образом, $v'(x) = 0 - \left(-\frac{4}{x^2}\right) = \frac{4}{x^2}$.</p><p><strong>3.</strong> Подставим найденные производные в формулу:</p><p>$f'(x) = 2\left(5 - \frac{4}{x}\right) \cdot \frac{4}{x^2}$.</p><p><strong>4.</strong> Упростим выражение:</p><p>$f'(x) = \frac{8}{x^2}\left(5 - \frac{4}{x}\right)$.</p><p>Можно также привести выражение в скобках к общему знаменателю и перемножить дроби:</p><p>$f'(x) = \frac{8}{x^2}\left(\frac{5x-4}{x}\right) = \frac{8(5x-4)}{x^3}$.</p><p><strong>Ответ:</strong> $f'(x) = \frac{8(5x-4)}{x^3}$.</p>"
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            "text" => "<p><strong>а)</strong> Для нахождения производной функции $f(x) = \left(4 + \frac{1}{x^2}\right)^3$ воспользуемся правилом дифференцирования сложной функции (цепным правилом): $(u(v(x)))' = u'(v(x)) \cdot v'(x)$. В данном случае, внешняя функция — это степенная функция $u(v) = v^3$, а внутренняя функция — $v(x) = 4 + \frac{1}{x^2}$.</p><p><strong>1.</strong> Найдём производную внешней функции: $u'(v) = (v^3)' = 3v^2$.</p><p><strong>2.</strong> Найдём производную внутренней функции. Для удобства представим $\frac{1}{x^2}$ как $x^{-2}$:</p><p>$v'(x) = \left(4 + \frac{1}{x^2}\right)' = (4 + x^{-2})' = (4)' + (x^{-2})'$.</p><p>Производная константы равна нулю: $(4)'=0$.</p><p>Производная степенной функции $(x^n)'=nx^{n-1}$: $(x^{-2})' = -2x^{-2-1} = -2x^{-3} = -\frac{2}{x^3}$.</p><p>Таким образом, $v'(x) = 0 - \frac{2}{x^3} = -\frac{2}{x^3}$.</p><p><strong>3.</strong> Теперь подставим всё в формулу производной сложной функции:</p><p>$f'(x) = 3\left(4 + \frac{1}{x^2}\right)^2 \cdot \left(-\frac{2}{x^3}\right)$.</p><p><strong>4.</strong> Упростим полученное выражение:</p><p>$f'(x) = -\frac{6}{x^3}\left(4 + \frac{1}{x^2}\right)^2$.</p><p><strong>Ответ:</strong> $f'(x) = -\frac{6}{x^3}\left(4 + \frac{1}{x^2}\right)^2$.</p><p><strong>б)</strong> Для нахождения производной функции $f(x) = \left(5 - \frac{4}{x}\right)^2$ также используем правило дифференцирования сложной функции. Здесь внешняя функция — $u(v) = v^2$, а внутренняя — $v(x) = 5 - \frac{4}{x}$.</p><p><strong>1.</strong> Найдём производную внешней функции: $u'(v) = (v^2)' = 2v$.</p><p><strong>2.</strong> Найдём производную внутренней функции. Представим $\frac{4}{x}$ как $4x^{-1}$:</p><p>$v'(x) = \left(5 - \frac{4}{x}\right)' = (5 - 4x^{-1})' = (5)' - (4x^{-1})'$.</p><p>Производная константы $(5)'=0$.</p><p>Производная $4x^{-1}$: $(4x^{-1})' = 4 \cdot (-1)x^{-1-1} = -4x^{-2} = -\frac{4}{x^2}$.</p><p>Таким образом, $v'(x) = 0 - \left(-\frac{4}{x^2}\right) = \frac{4}{x^2}$.</p><p><strong>3.</strong> Подставим найденные производные в формулу:</p><p>$f'(x) = 2\left(5 - \frac{4}{x}\right) \cdot \frac{4}{x^2}$.</p><p><strong>4.</strong> Упростим выражение:</p><p>$f'(x) = \frac{8}{x^2}\left(5 - \frac{4}{x}\right)$.</p><p>Можно также привести выражение в скобках к общему знаменателю и перемножить дроби:</p><p>$f'(x) = \frac{8}{x^2}\left(\frac{5x-4}{x}\right) = \frac{8(5x-4)}{x^3}$.</p><p><strong>Ответ:</strong> $f'(x) = \frac{8(5x-4)}{x^3}$.</p>"
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№16.7 (с. 96)
Условие. №16.7 (с. 96)
скриншот условия
Алгебра, 10 класс Учебник, авторы: Абылкасымова Алма Есимбековна, Жумагулова Зауре Абдыкеновна, издательство Мектеп, Алматы, 2019, страница 96, номер 16.7, Условие

Найдите производные функций (16.7–16.9):

16.7. a) $f(x) = \left(4 + \frac{1}{x^2}\right)^3;$

б) $f(x) = \left(5 - \frac{4}{x}\right)^2.$

Решение. №16.7 (с. 96)
Алгебра, 10 класс Учебник, авторы: Абылкасымова Алма Есимбековна, Жумагулова Зауре Абдыкеновна, издательство Мектеп, Алматы, 2019, страница 96, номер 16.7, Решение
Решение 2. №16.7 (с. 96)

а) Для нахождения производной функции $f(x) = \left(4 + \frac{1}{x^2}\right)^3$ воспользуемся правилом дифференцирования сложной функции (цепным правилом): $(u(v(x)))' = u'(v(x)) \cdot v'(x)$. В данном случае, внешняя функция — это степенная функция $u(v) = v^3$, а внутренняя функция — $v(x) = 4 + \frac{1}{x^2}$.

1. Найдём производную внешней функции: $u'(v) = (v^3)' = 3v^2$.

2. Найдём производную внутренней функции. Для удобства представим $\frac{1}{x^2}$ как $x^{-2}$:

$v'(x) = \left(4 + \frac{1}{x^2}\right)' = (4 + x^{-2})' = (4)' + (x^{-2})'$.

Производная константы равна нулю: $(4)'=0$.

Производная степенной функции $(x^n)'=nx^{n-1}$: $(x^{-2})' = -2x^{-2-1} = -2x^{-3} = -\frac{2}{x^3}$.

Таким образом, $v'(x) = 0 - \frac{2}{x^3} = -\frac{2}{x^3}$.

3. Теперь подставим всё в формулу производной сложной функции:

$f'(x) = 3\left(4 + \frac{1}{x^2}\right)^2 \cdot \left(-\frac{2}{x^3}\right)$.

4. Упростим полученное выражение:

$f'(x) = -\frac{6}{x^3}\left(4 + \frac{1}{x^2}\right)^2$.

Ответ: $f'(x) = -\frac{6}{x^3}\left(4 + \frac{1}{x^2}\right)^2$.

б) Для нахождения производной функции $f(x) = \left(5 - \frac{4}{x}\right)^2$ также используем правило дифференцирования сложной функции. Здесь внешняя функция — $u(v) = v^2$, а внутренняя — $v(x) = 5 - \frac{4}{x}$.

1. Найдём производную внешней функции: $u'(v) = (v^2)' = 2v$.

2. Найдём производную внутренней функции. Представим $\frac{4}{x}$ как $4x^{-1}$:

$v'(x) = \left(5 - \frac{4}{x}\right)' = (5 - 4x^{-1})' = (5)' - (4x^{-1})'$.

Производная константы $(5)'=0$.

Производная $4x^{-1}$: $(4x^{-1})' = 4 \cdot (-1)x^{-1-1} = -4x^{-2} = -\frac{4}{x^2}$.

Таким образом, $v'(x) = 0 - \left(-\frac{4}{x^2}\right) = \frac{4}{x^2}$.

3. Подставим найденные производные в формулу:

$f'(x) = 2\left(5 - \frac{4}{x}\right) \cdot \frac{4}{x^2}$.

4. Упростим выражение:

$f'(x) = \frac{8}{x^2}\left(5 - \frac{4}{x}\right)$.

Можно также привести выражение в скобках к общему знаменателю и перемножить дроби:

$f'(x) = \frac{8}{x^2}\left(\frac{5x-4}{x}\right) = \frac{8(5x-4)}{x^3}$.

Ответ: $f'(x) = \frac{8(5x-4)}{x^3}$.

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