Question

Нужно решение по этим номерам

Answer 1

A10

$y = {x}^{2} \times \cos(x) \\ ({x}^{2} \times \cos(x))^{'} = {x}^{2} \times ( \cos(x)) {}^{'} + ({x}^{2} ) {}^{'} \times \cos(x) = \\ = {x}^{2} \times( - \sin(x) ) + 2x \times \cos(x) = \\ = - {x}^{2} \sin(x) + 2x \cos(x)$

B1

$y = 14 \sqrt{2x - 3} \\ (14 \sqrt{2x - 3} ) ^{ '} = 14 \times \frac{1}{2 \sqrt{2x - 3} } \times 2 = \frac{12}{ \sqrt{2x - 3} } \\ x_{0} = 26 \\ \frac{12}{ \sqrt{2 \times 26 - 3} } = \sqrt{49 } = 7$