函数f(x)=(x-1)/(x+1)的反函数是().

函数f(x)=(x-1)/(x+1)的反函数是().

A.f-1(x)=(x-1)/(x+1)

B.f-1(x)=(1-x)/(1+x)

C.f-1(x)=(x+1)/(x-1)

D.f-1(x)=(1+x)/(1-x)

正确答案是D

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