发布网友
共1个回答
热心网友
由y=xsin2x,
则y′=(xsin2x)′=x′sin2x+x(sin2x)′=sin2x+xcos2x?(2x)′=sin2x+2xcos2x.
故选D.
热心网友
由y=xsin2x,
则y′=(xsin2x)′=x′sin2x+x(sin2x)′=sin2x+xcos2x?(2x)′=sin2x+2xcos2x.
故选D.