(x-(x+1分之2x))除以x^2-1分之x^2-2x+1

问题描述:

(x-(x+1分之2x))除以x^2-1分之x^2-2x+1
1个回答 分类:数学 2014-11-24

问题解答:

我来补答
原式=(x²+x-2x)/(x+1)÷[(x-1)²/(x+1)(x-1)]
=(x²-x)/(x+1)÷[(x-1)/(x+1)]
=x(x-1)/(x+1)*(x+1)/(x-1)
=x
 
 
展开全文阅读
剩余:2000
下一页:铜,及其化合物