From my text book it says that $f(x)= x^3$ and $f^{-1}(x) = \sqrt[3]{x}$ , which I totally agree with.
why does $f(x)= \frac 1 {x-1}$ and $f^{-1}(x)= \frac 1 {x + 1}$ and not equal $f^{-1}(x)= \frac 1 {x+1}$?
I know when you inverse a function you reverse the sign values. Can anyone explain this to me a little more thoroughly?
(use curl brackets for multichar objects in FRAC)