一道七年级分式加减题(x+1-1/1-x)÷(x-x2/x-1)
问题描述：
一道七年级分式加减题
(x+1-1/1-x)÷(x-x2/x-1)
答
1楼回答正确！
答
原式=[(x+1)+1/(x-1)]÷[-(x²-x)/(x-1)]
=[(x²-1+1)/(x-1)]÷[-x(x-1)/(x-1)]
=[x²/(x-1)]÷(-x)
=-x/(x-1)