(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
计算：(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
计算：(5-xy/x^3-x^2y)/(1-5/xy)^2*(y-x)^3
数学人气：630 ℃时间：2020-05-12 01:34:18
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