y=log2(x/x-1)(x大于1)的反函数是
问题描述:
y=log2(x/x-1)(x大于1)的反函数是
答
2^y=x/(x-1)
x2^y-2^y=x
x(2^y-1)=2^y
x=(2^y)/(2^y-1)