求函数log2(x+1/x-1)的反函数.

问题描述:

求函数log2(x+1/x-1)的反函数.

y=log(2)[(x+1)/(x-1)]
2^y=(x+1)/(x-1)
(2^y)(x-1)=x+1
x*2^y-2^y=x+1
(2^y-1)x=2^y+1
x=(2^y+1)/(2^y-1)
反函数y=(2^x+1)/(2^x-1)
x不等于0
2^x表示2的x次方