SOLUTION: find the sum of the following arithmetic series and write in summation notation http://prntscr.com/sfire3

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Question 1158911: find the sum of the following arithmetic series and write in summation notation
http://prntscr.com/sfire3
Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!

a.
,,...
since you have arithmetic series, the common difference is
the sum of first terms formula is



.....substitute given values







c.
,,...












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