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Short and sweet (Posted on 2011-02-21)

Let n be any natural number whose square is also the difference between two consecutive cubes.

Prove that 2n-1 is also a square.

See The Solution Submitted by broll

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re: spoiler

| Comment 3 of 4 |

(In reply to spoiler by xdog)

A beautiful proof!!

Posted by Ady TZIDON on 2011-02-25 06:23:33

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