CPM Homework Help : A2C Problem 8-9

Find the inverse functions for the functions given below.

$f ( x ) = \sqrt [ 3 ] { 4 x - 1 }$
Hint (a):
Switch x and f(x) and solve for f(x).
Answer (a):
$f^{-1}(x)=\frac{x^{3}+1}{4}$