Arithmetic series

steffimalcampo91 Posts: 21, Reputation: 1

New Member

Jun 29, 2007, 04:41 PM

arithmetic series

look for S15: upper limit= 15, nth term(explicit)=(20-k), k(index)=1(lower limit)

galactus Posts: 2,271, Reputation: 282

Ultra Member

Jun 29, 2007, 04:46 PM

$\sum_{k=1}^{15}(20-k)$

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