Question

f (x)=-1/cos5x туынды

Answer 1

$y=- frac{1}{cos5x}\\ f'(x)=(- frac{1}{cos5x})'= -frac{1'cdotcos5x-1cdot(cos5x)'}{(cos5x)^2}=- frac{5sin5x}{cos^25x}$

Answer 2

спасибо