Question

化简：[（x-3分之一）减（x-1分之x+1）]乘以（x-3）的结果是：拜托了各位 谢谢

Answer 1

原式=[1/(x-3)-1/(x-1)]*(x-3) =1-(x-3)/(x-1) =(x-1-x+3)/(x-1) =2/(x-1)