Question

若函數(shù)是函數(shù)的反函數(shù)，其圖象經(jīng)過點，則（   ）

A．

B．

C．

D．

Answer 1

C

∵函數(shù)是函數(shù)的反函數(shù)，
∴．
∵函數(shù)y=f(x)的圖象經(jīng)過點
∴．
∴．