Practice!

Sample Problem

Are f and g inverse functions?

f(x)=x3+6

g(x)=

Solution

f-1 is an inverse of f if and only if f-1 fulfills the following properties:

f-1(f(x))=x and f(f-1(x))=x

Let us assume g(x)=f-1(x).

f-1(f(x))=f-1(x3+6)=