SOLUTION: How to write the series in sigma/summation notation? -2 + 1 + 4 + 7 + ... + 22

Question 976774: How to write the series in sigma/summation notation?
-2 + 1 + 4 + 7 + ... + 22
Answer by FrankM(1040) (Show Source): You can put this solution on YOUR website!

You can study the answer to see how it was obtained. The difference of 3 from one term to the next. 9 terms in the series. The -2 to start the series at -2.
Note, it would look a bit different if we started at n=0, but many teachers prefer to see a result where the first term is referenced as n=1
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