f(x)=x^3(x-3)的求导过程

问题描述:

f(x)=x^3(x-3)的求导过程

f(x)=x^3(x-3)=x^4-3x^3
f'(x)=4x^3-9x^2
或f'(x)=(x^3)'*(x-3)+(x-3)'*x^3
=3x^2(x-3)+x^3
=4x^3-9x^2