Implicit and Inverse Function Theorems

[Dahaka14]

What is a good book that gives a clear idea of what these theorems are? I am taking differential geometry, and I would like to try and get a better understanding of them. To be honest, my calculus sequence NEVER went over them, so I need to get these ideas under my belt.

[Daverz]

Wikipedia is not too bad for this:

http://en.wikipedia.org/wiki/Implicit_function_theorem

Also All the Mathematics You Missed [But Need to Know for Graduate School] (http://www.amazon.com/All-Mathematics-You-Missed-Graduate/dp/0521797071).