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5.6: Transcendental Functions  Created by: CK-12  Inverse
Functions  A problem that is worth thinking about as a useful
tool, as well as a foreshadowing of future ideas, is how to work
around the one-to-one restriction. There are times when an
inverse is needed, even though the function is not one-to-one,
and there may be some restrictions that can be applied to make
it happen. For instance: what is the inverse function f(x)=x^2?
The lesson in the text illustrates clearly that it is not a one-
to-one function. The instructions for finding an inverse
function state to solve for the dependent variable, which states
that the inverse function is \pm \sqrt{x}, which is really not a
function at all, with two outputs for every input. If we take
only the positive part, then we can call it a function. Now it's
important to understand that this isn't a complete inverse, but
is more of a functional inv