(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Can't believe I forgot how to do this...

Prove if fog = x and goh = x then f=h for all x.

2. Relevant equations

Obviously the associativity of composition here.

3. The attempt at a solution

So we know :

fog = goh

fogoh = gohoh

fo(goh) = (goh)oh

I've forgotten how to do the rest here.

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# Homework Help: Some composition stuff.

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