关于x的分式方程

Question

如题所述

Answer 1

(x+1)/(x+2)- x/(x-1)
=[(x+1)(x-1)-x(x+2)]/[(x+2)(x-1)]
=(x^2-1-x^2+2x)/[(x+2)(x-1)]
=(2x-1)/[(x+2)(x-1)]

=>
a=2本回答被提问者和网友采纳