The Inverseof a Function
We discussedabovethe conditionfor a one-to-onefunction:for eachoutput,thereis only one input.A one-
to-onefunctioncan be reversedin sucha way that the inputof the functionbecomesthe outputand the
outputbecomesan input.This reverseof the originalfunctionis calledtheinverseof the function.If is
an inverseof a function then For example,the two functions and
are inversesof eachothersinceThus