问题描述： 计算：(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3 1个回答 分类：数学 2014-09-30 问题解答： 我来补答 (5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3=-(x-y)^3[-(xy-5)/x^2(x-y)]/[(xy-5)/xy]=(x-y)^3(xy-5)xy/x^2(x-y)(xy-5)=y(x-y)^2/x 展开全文阅读
