Question

求导f=(x)=e^(-3x)sin5x

Answer 1

f '(x)=[e^(-3x)] 'sin5x+[e^(-3x)](sin5x) '

=[e^(-3x)] (-3x) 'sin5x+[e^(-3x)]cos5x·(5x) '

=-3[e^(-3x)] sin5x+5[e^(-3x)]cos5x