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        riddles >> putnam exam (pure math) >> What's this series?
        
(Message started by: Quetzycoatl on Dec 22nd, 2003, 1:37pm)
Title: What's this series?
Post by Quetzycoatl on Dec 22nd, 2003, 1:37pm
9, 81, 18, 81, 9, 702, 9, 171, 27....?

1) what are the next few terms of this series?
2) what does this series describe?
3) can you write a formula to predict elements of this series?


-Quetzycoatl
Title: Re: What's this series?
Post by Icarus on Dec 22nd, 2003, 3:55pm
Please don't post the same thread in 2 different forums. It causes the discussion to become disjointed. I'm locking this thread for now, and will delete it later. For those interested, the same thread is in the Hard forum, and replies may be posted there.

(I left that one, since the Hard forum receives considerably more attention than this one!)


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