Inverse Functions
Notation
The function, f -1 (x) , is defined as the inverse function of f(x) if it consistently reverses the process of f(x). That is, if f(x) turns a into b, then f -1 (x) must turn b into a. f -1 (x) is not an exponent and is read “the inverse of function f.†It is meant to be an inverse function, not a reciprocal.