# Difference between revisions of "Perfect square"

ComplexZeta (talk | contribs) |
m (Sum of squares formula) |
||

Line 1: | Line 1: | ||

An [[integer]] <math>n</math> is said to be a '''perfect square''' if there is an integer <math>m</math> so that <math>m^2=n</math>. The first few perfect squares are 0, 1, 4, 9, 16, 25, 36. | An [[integer]] <math>n</math> is said to be a '''perfect square''' if there is an integer <math>m</math> so that <math>m^2=n</math>. The first few perfect squares are 0, 1, 4, 9, 16, 25, 36. | ||

+ | |||

+ | The sum of the first <math>n</math> square numbers (not including 0) is <math>\frac{n(n+1)(2n+1)}{6}</math> | ||

{{stub}} | {{stub}} |

## Revision as of 08:30, 29 June 2006

An integer is said to be a **perfect square** if there is an integer so that . The first few perfect squares are 0, 1, 4, 9, 16, 25, 36.

The sum of the first square numbers (not including 0) is

*This article is a stub. Help us out by expanding it.*