求导,f(x)=x三次幂+3a x二次幂+3(a+2)x+1
问题描述:
求导,f(x)=x三次幂+3a x二次幂+3(a+2)x+1
答
f(x)=x^3+3ax^2+3(a+2)x+1
f'(x)=3x^2+6ax+3(a+2)