设Z=sin(x+y)e的f(xy)次方,求əz/əx,əz/əy
问题描述:
设Z=sin(x+y)e的f(xy)次方,求əz/əx,əz/əy
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).