Производная f(x)= 4x-1/x^3

Question

Производная f(x)= 4x-1/x^3

Answer 1

F'(x)=(4x-1/x^3)'=((4x-1)'×x^3-(4x-1)×(x^3)')/x^6=(4x^3-(4x-1)×3x^2)/x^6=4x-3(4x-1)/x^4=4x-12x+3/x^4=-8x+3/x^4