(adsbygoogle = window.adsbygoogle || []).push({}); Please HELP....Differentiating Inverse Functions

1. The problem statement, all variables and given/known data

f(x) = x^3 + 2x - 1 when a=2

2. The attempt at a solution

I thought you did...

1/(f '(f-1(x)))

but I am not sure how to solve for x?

0=x^3 + 2x - 1

1=x^3 + 2x -1

I tried factoring but that did not work either.

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# Homework Help: Differentiating Inverse Functions

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