问题描述: (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 1个回答 分类:数学 2014-11-13 问题解答: 我来补答 (x+1-1/1-x)÷(x-x²/x-1)=[(x+1)+1/(x-1)]×[-(x-1)/x(x-1)]=(x²-1+1)/(x-1)×(-1/x)=-x/(x-1) (x-4/x²-x-6+ x+2/x-3)÷x+1/x-3=[(x-4)+(x+2)²]/(x+2)(x-3)×(x-3)/(x+1)=(x²+5x)/(x+2)(x+1) 展开全文阅读