SOLUTION: Use summation notation to write the series 2.2+8.8+15.4+... for 5 terms.

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Question 853286: Use summation notation to write the series 2.2+8.8+15.4+... for 5 terms.
Answer by Edwin McCravy(20056)   (Show Source): You can put this solution on YOUR website!
2.2+8.8+15.4+...

8.8-2.2 = 6.6
15.4-8.8 = 6.6

d = 6.6
a1 = 2.2

nth term = a1+(n-1)d = 2.2+(n-1)(6.6) = 2.2+6.6n-6.6 = 6.6n-4.4



That's probably as far as you were expected to take it, but
it can be simplified as



Edwin
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