答:
1/x+1+x/x^2-1+2x/x-1=2
两边同时乘以x^2-1得:
(x-1)+x+2x(x+1)=2(x^2-1)
2x-1+2x^2+2x=2x^2-2
4x=-1
x=-1/4
经检验,x=-1/4是原分式方程的根