Try reading this:
Inverse function - Wikipedia, the free encyclopedia
Find the inverse function of each function above and sketch both funtion and inverse function.
(Please show me all answers of the 3 function I given, you no have to worry about I have no exercise to try, because I have a lot of exercise books. Thanks a lot.)
Try reading this:
Inverse function - Wikipedia, the free encyclopedia
Inverse function
Should give a better understanding in that table.