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Two Geometric Series (Posted on 2003-07-14) Difficulty: 2 of 5
Find a geometric series of 3 or more positive integers, starting with 1, such that its sum is a perfect square.

See if you can find another such series.

See The Solution Submitted by Brian Smith    
Rating: 3.6667 (6 votes)

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answer Comment 10 of 10 |
There are an innumerable number of series that satisfy the given conditions.

Two these are 1,7,49,343 and 1,3,9,27,81.

Edited on November 9, 2007, 9:16 am
  Posted by K Sengupta on 2007-11-08 09:53:58

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