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Divisible by 7 (Posted on 2007-02-15) Difficulty: 3 of 5
Prove that if A = ½(15+√197), then 7 is a factor of [A^n] for all positive integer values of n, where [w] denotes the greatest integer less than or equal to w.

See The Solution Submitted by Dennis    
Rating: 4.0000 (1 votes)

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Some Thoughts re(2):Look 4 the conjugate.... still open | Comment 3 of 5 |
(In reply to re:Look 4 the conjugate by Dennis)

I ERRED.

NEED A HINT........


  Posted by Ady TZIDON on 2007-02-26 08:16:13
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