Proof that the sum of squares of the first n whole numbers is n^3/3 + n^2/2 + n/6

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3 points

18 years ago

In the thread about Bobby Fischer there was a short discussion of the number of squares on a chess board. I couldn't resist tackling the general nxn problem and deriving the proof. Turns out a picture really helps.

Proof that the sum of squares of the first n whole numbers is n^3/3 + n^2/2 + n/6 | Heykuki News