作业帮[-(xy)/(x-y)²]^4*(y²-xy/x)³*x^4/y^10÷(x/xy-y²)^5,y=-1就是（y²-xy）³(xy-y²)^5/(x-y)^8*y^6,就是y³,y=-1
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/13 11:56:40
![[-(xy)/(x-y)²]^4*(y²-xy/x)³*x^4/y^10÷(x/xy-y²)^5,y=-1就是（y²-xy）³(xy-y²)^5/(x-y)^8*y^6,就是y³,y=-1](/uploads/image/z/5303246-14-6.jpg?t=%5B-%28xy%29%2F%28x-y%29%26%23178%3B%5D%5E4%2A%28y%26%23178%3B-xy%2Fx%29%26%23179%3B%2Ax%5E4%2Fy%5E10%C3%B7%28x%2Fxy-y%26%23178%3B%29%5E5%2Cy%3D-1%E5%B0%B1%E6%98%AF%EF%BC%88y%26%23178%3B-xy%EF%BC%89%26%23179%3B%28xy-y%26%23178%3B%29%5E5%2F%28x-y%29%5E8%2Ay%5E6%2C%E5%B0%B1%E6%98%AFy%26%23179%3B%2Cy%3D-1)
[-(xy)/(x-y)²]^4*(y²-xy/x)³*x^4/y^10÷(x/xy-y²)^5,y=-1就是（y²-xy）³(xy-y²)^5/(x-y)^8*y^6,就是y³,y=-1
[-(xy)/(x-y)²]^4*(y²-xy/x)³*x^4/y^10÷(x/xy-y²)^5,y=-1
就是（y²-xy）³(xy-y²)^5/(x-y)^8*y^6,就是y³,y=-1
[-(xy)/(x-y)²]^4*(y²-xy/x)³*x^4/y^10÷(x/xy-y²)^5,y=-1就是（y²-xy）³(xy-y²)^5/(x-y)^8*y^6,就是y³,y=-1
（-1）³,原式=-1