Binomial theorem fun

Anyone know (or would like to know) under which circumstances this:

$(a+b)^n=a^n+b^n$

is right? I’ll wait for comments, then post the solution in a week ;)

Wednesday, July 8th, 2009 Math

For (all) n=1 is correct, but there’s a more delicate solution related to number theory ;)

Robert on July 9th, 2009

[...] situation I described in Binomial theorem fun is also known as the Freshman’s Dream Theorem. Actually, if you [...]

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