问题描述: 设Z=sin(x+y)e的f(xy)次方,求əz/əx,əz/əy 1个回答 分类:综合 2014-12-10 问题解答: 我来补答 əz/əx=[cos(x+y)+ysin(x+y)f'(xy)]e^f(xy);əz/əy=[cos(x+y)+xsin(x+y)f'(xy)]e^f(xy). 展开全文阅读