y=x+1分之x-1的反函数是什么啊?

y=(x-1)/(x+1)(x+1)*y=x-1xy+y=x-1x(y-1)=-y-1x=-(y+1)/(y-1)所以y=(x-1)/(x+1)的反函数是y=-(x+1)/(x-1) (x≠1)