Answer:
The outputs of the function \displaystyle ff are the inputs to \displaystyle {f}^{-1}f
−1
, so the range of \displaystyle ff is also the domain of \displaystyle {f}^{-1}f
−1
. Likewise, because the inputs to \displaystyle ff are the outputs of \displaystyle {f}^{-1}f
−1
, the domain of \displaystyle ff is the range of \displaystyle {f}^{-1}f
−1
. We can visualize the situation.
