I need help finding the inverse for this function

What I've done so far.

Let

Swap x and y, and solve for y

I'm stuck here, can anyone please help?

Nevermind, I got it, had to complete the square!

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- Nov 25th 2009, 11:28 PMuser_5Finding the inverse of a function
I need help finding the inverse for this function

What I've done so far.

Let

Swap x and y, and solve for y

I'm stuck here, can anyone please help?

Nevermind, I got it, had to complete the square! - Nov 26th 2009, 02:11 AMrowe
I had typed this up by the time I saw your last comment, d'oh- so I post anyways.

Set g(x) to y:

Complete that square:

Swap x and y, so that

Prove to check; it should be that f(g(x)) = g(f(x)) = x, here's an example: