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[Post New]28 Mar 2008 22:32:33 IST
    Subject: Re:Coefficient problem
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computer001 (1847)

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Olaaa!! Perrrfect answer. 297  [478 rates]
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this is basically probability:
integers which can sum up to 7 are: (7),(6,1),(5,2),(4,3),(2,4,1)
hence v have (-1)^1*7 + (-1)^2*6 + (-1)^2*12 +(-1)^2(10) + (-1)^3*(8)
=-7+6+10+12-8=13


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