求导数y=e^x*sin2x y=4(x+1)^2+(3x+1)^2求导数y=e^xsin2xy=4(x+1)^2+(3x+1)^2能用复合函数做么?怎么求导数.

问题描述:

求导数y=e^x*sin2x y=4(x+1)^2+(3x+1)^2
求导数y=e^xsin2x
y=4(x+1)^2+(3x+1)^2
能用复合函数做么?怎么求导数.

y=e^xsin2x
y'=e^xsin2x+e^x*cos2x*(2x)'
=e^xsin2x+2e^x*cos2x
y=4(x+1)^2+(3x+1)^2
y'=8(x+1)+2(3x+1)*(3x+1)'
=8(x+1)+6(3x+1)
=8x+8+18x+6
=26x+14