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January 28, 2015

January 28, 2015

Posted by **M** on Wednesday, September 1, 2010 at 8:10pm.

- math -
**bobpursley**, Wednesday, September 1, 2010 at 8:16pmSo what is the sum of 3+4+5+...37+38 ?

It is an arithemetic sum, first term 3, d=1

http://en.wikipedia.org/wiki/Arithmetic_progression

n= 36 terms

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

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