Question

Найдите производную функции f(x)=3sin x/4x-5

Answer 1

f'(x)=3*cos(x/(4x-5))*(x/(4x-5))'=3*((4x-5-4x)/(4x-5)^2)*cos(x/(4x-5))=-15*cos(x/(4x-5))/(4x-5)^2