You are given that the funcion is one-to-one when restricted on
Find the domain of the inverse function of f,
and find a formula for the inverse function.
I am totally stumped on this one.
@OP: To find the domain of the inverse function you should recall that . So your job boils down to finding the range of the given function (so it looks like something is left for you to do after all). This job is quite straightforward since you know that f is a one-to-one function ....