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Homework Help: Index of summation question

  1. Sep 24, 2006 #1
    I have a problem with an inequality. In the numberator of one term I have X sub k, and in the denominator I have the sum X sub ks from 1 to n. So lets say I use n=2 and have two terms in the denominator Xsub1 and Xsub2. What am I using for the X sub k in the numerator. It definitely is not X sub n.
     
  2. jcsd
  3. Sep 24, 2006 #2

    radou

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    The k in the numerator does and can not have anything to do with the k in the denominator, unless I'm missing something.
     
  4. Sep 24, 2006 #3
    The same that I am missing I think. There has to be another summation for that k to exist in the numerator right?
     
  5. Sep 24, 2006 #4

    radou

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    Could you present the problem perhaps..?
     
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