Question

Зяблс по фасту может кто сделать? Хотябы 7 и 8, времени мало, па братски)

Answer 1

Ответ:

$7)y' = \frac{1}{ \cos(x) } \times (\cos(x)) ' = \frac{1}{ \cos(x) } \times ( - \sin(x)) = \\ = - tg(x)$

$8)y' = 1 - \frac{2}{x}$

$9)y' = ( {x}^{2} )' \times ln(x) - (ln(x)) ' \times {x}^{2} = \\ = 2x ln(x) - \frac{1}{x} \times {x}^{2} = \\ = 2x ln(x) - x = x(2 ln(x) - 1)$

$10)y' = \frac{1}{x + 1}$

$y'' = ( {(x + 1)}^{ - 1} ) '= - {(x +1 )}^{ - 2} = - \frac{1}{ {(x + 1)}^{2} }$