f(t)=e^(2t)sin3t如何求导?步骤!
问题描述：
f(t)=e^(2t)sin3t如何求导?步骤!
答
f(t)=e^(2t)sin3t
=[e^(2t)]'sin3t +e^(2x)(sin3t)'
=e^(2t)sin3t*(2t)'+e^(2x)cos3t*(3t)'
=2e^(2t)sin3t+3e^(2x)cos3t