SOLUTION: Evaluate each series using sum formulas. 4 + 12 + 20 + 28 + …; n = 9 ie the sum of the 1st nine terms

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Question 849386: Evaluate each series using sum formulas.
4 + 12 + 20 + 28 + …; n = 9 ie the sum of the 1st nine terms

Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi,
{4 + 12 + 20 + 28 +...} Arithmetic Series d = 8

= 324
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