Question

一道分式探究题有这样一道题；计算x^2-1分之x^2-2x+1除以（x^+x分之x-1）-x,的值,其中x=2004,甲

Answer 1

题目化简,带入即可.

(x²-2x+1)/(x²-1)÷[(x-1)/(x²+x)] -x

=(x-1)²/(x-1)(x+1)× [x(x+1)/(x-1)]-x

= (x-1)/(x+1)× [x(x+1)/(x-1)]-x=0,

如果题目没有错的话,x＝任何数,都可以正确.