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[Post New]12 May 2008 12:54:23 IST
    Subject: Re:Sum of 1 + (1+x) +(1+x+x^2)+(1+x+x^2+x^3)+(1+x+x^2+x^3+x^4).. up to n terms
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allamraju (3415)

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Olaaa!! Perrrfect answer. 605  [800 rates]
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sriram,I think u made a mistake after subtraction,It becomes,

S(x-1)={xn+1+.....+x+1}-(n+1),which on simplifying gives the same ans as mine.
MAKING A MISTAKE IS HUMAN BUT REPEATING IT IS IDIOTIC.
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