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Homework Help: Series to Sigma Notation

  1. Apr 22, 2010 #1
    1. Write each series using sigma notation.

    2. The series is:

    2 + 5 + 10 + 17 + 26 + 37

    3. I know that above the sigma, the number is 6 because there are only six terms in the series. The trouble I seem to have with this is the fact that the series is neither arithmetic or geometric. It increases by consecutive odd integers. I don't know how to figure the notation for this series.
  2. jcsd
  3. Apr 22, 2010 #2


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    Staff: Mentor

    Hint -- Each odd number can be written as twice some number plus one...
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