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## Homework Statement

Suppose [itex]f^{-1}(x)[/itex] is the inverse function of a differentiable function [itex]f[/itex] Let [itex]G(x) = \frac{1}{f^{-1}(x)}[/itex] If [itex]f(3) = 2 [/itex] and [itex]f'(3) = 1/9[/itex] , find [itex]G'(2) [/itex].

**2. Stuff to know..**

[itex](f^{-1}(x))' = \frac{1}{f'(f^{-1}(x))} [/itex]

## The Attempt at a Solution

http://i.imgur.com/X5Q9A.jpg?1?7662

I just have no idea if I'm doing this right or not..or if I've made a stupid calculation error. Thanks for the help!

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