Sums of Squares Formula (VIDEO!)

We have a formula for the sums of integers (one-th powers):
1+2+3+…+N
and a formula for the sums of cubes:
1^3 + 2^3 + 3^3 + .. + N^3.
Here, at last, is a video deriving the formula for the sum of squares
1^2 + 2^2 + 3^2 + … + N^2.
We use just simple techniques.
We end with some big questions about all these formulas.

Sums of Squares Formula

To be complete here are the Sums of Integers and the Sums of Cubes videos.

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