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Can you check to see if i expressed the sums in closed form correctly?

  1. Oct 28, 2006 #1
    Hello everyone, I was wondering if someone can double check my work for #'s 25 and 31.

    The directions say:
    Express each of the sums in closed form (without using a summation symbol and without using an ellipis...).

    http://img224.imageshack.us/img224/3514/lastscanle2.jpg [Broken]

    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. Oct 28, 2006 #2


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    You used the index from the sum instead of the limit. So 25 should be 5m not 5i

    Also, 31 is (1 + 1/2)n, which means not only should you have gotten 3/2n, but it should have been (3/2)n
  4. Oct 29, 2006 #3
    thanks alot for catching those errors!
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