问题描述: 求解答(x- x/x²-1)/(2+1/x-1 - 1/x+1) 1个回答 分类:数学 2014-09-18 问题解答: 我来补答 原式=(x³-x-x)/(x+1)(x-1)÷(2x²-2+x+1-x+1)/(x+1)(x-1)=(x³-2x)/(x+1)(x-1)×(x+1)(x-1)/2x²=x(x²-2)/(x+1)(x-1)×(x+1)(x-1)/2x²=(x²-2)/2x 展开全文阅读