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September 20, 2014

Posted by **Embraced** on Tuesday, January 10, 2012 at 9:25pm.

- Arithmetic Series -
**Steve**, Wednesday, January 11, 2012 at 12:21amS

_{n}= n/2 (a_{1}+ a_{n})

360 = n/2(42 - 26)

360 = 8n

n = 45

- Arithmetic Series -
**Anonymous**, Friday, January 13, 2012 at 10:54pmMay I ask how did you get that 8n...I'm having trouble working it out on paper for another problem

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