设函数z=e2x2+xy-y2,则z/y____.

设函数z=e2x2+xy-y2,则z/y____.
【正确答案】:e2x2+xy-y2(x-2y) .解析:根据偏导数概念求解 ∂z/∂y=(e2x2+xy-y2)′y= e2x2+xy-y2(x-2y).