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Re:Sample 2

Posted by wangjie2008 at 2008-08-31 13:44:33 on Problem 3682 and last updated at 2008-08-31 13:44:57
In Reply To:Re:Sample 2 Posted by:gifty_lee at 2008-08-31 13:40:51
> I'm sorry, it shoule be [1+(1/2+1/4....+1/2^n)+(2/2+4/4+6/8.....+2*n/2^n)]
Why it should be so?

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