Thread: Inverses

If f is a one-to-one, twice differentiable function with inverse function g, show that:



OK, here's where I am:









So I'm close to the answer, but I don't see how to take it from here. Have I made any mistakes thus far or am I just missing the next step? (or both).

Thanks.

You answer is equivalent look up one line and what does

Ack! Right in front of my eyes. Thanks.