求导f=(x)=e^(-3x)sin5x
问题描述:
求导f=(x)=e^(-3x)sin5x
答
f '(x)=[e^(-3x)] 'sin5x+[e^(-3x)](sin5x) '
=[e^(-3x)] (-3x) 'sin5x+[e^(-3x)]cos5x·(5x) '
=-3[e^(-3x)] sin5x+5[e^(-3x)]cos5x