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September 19, 2014

September 19, 2014

Posted by **elito** on Thursday, June 28, 2012 at 10:04am.

10, 18, 26 . . .

- sequence math -
**Reiny**, Thursday, June 28, 2012 at 10:10amFor an AS

Sum(n) = (n/2)(2a + d(n-1))

in your case

Sum(27) = (27/2)(20 + 26(8) )

= ...

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