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May 26, 2015

Homework Help: Math

Posted by mary11 on Tuesday, December 12, 2006 at 7:50pm.

In sequences and series:::


I dont understand the difference between (for arthemtic series) the equations

1) sn= t/2(ti-tn)

2) (n* n-1)/2

where would you use each one and how are they different?

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