SUMMATION

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SANZEED
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SUMMATION

Unread post by SANZEED » Wed Jan 18, 2012 11:37 pm

GENERAL SUMMATION
LET $s(n) = \sum_{k=1}^{n}(p-1+k)Pk$ where p is a given positive integer and nis a natural number.then find a nice simple formula for $s(n)$ involving $n,p$.
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Phlembac Adib Hasan
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Re: SUMMATION

Unread post by Phlembac Adib Hasan » Thu Jan 19, 2012 11:52 am

Hint:
Remember the process to find $\sum_{k=1}^{n}k(k+1) $.
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SANZEED
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Re: SUMMATION

Unread post by SANZEED » Wed Jan 25, 2012 12:40 am

I solved it with induction
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