Question

Найди производную функции f(x)=cos(-3x^2+x+1)

Answer 1

$y=cos(-3x^2+x+1)\\\\y'=-sin(-3x^2+x+1)\cdot (-3x^2+x+1)'=\\\\=-sin(-3x^2+x+1)\cdot (-6x+1)=sin(-3x^2+x+1)\cdot (6x-1)$