- #1

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## Homework Statement

I need to prove that the least common multiple operation is associative.

## Homework Equations

## The Attempt at a Solution

Pages of crappy algebra trying to use the fact that LCM(a,b) = |ab|/gcd(a,b)

I hate to be "that guy" that doesn't post much of an attempt but I am getting nowhere with this. Maybe a hint or a fact about the LCM that will lead to a proof..?