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Sigma Notation help requested

  1. Apr 12, 2012 #1
    1. The problem statement, all variables and given/known data

    "Express the following sum in sigma notation:

    1 + (2/3) + (3/5) + (4/7) + (5/9)"

    2. Relevant equations



    3. The attempt at a solution

    I've figured out what they all have in common (1+2=3, 2+3=5, 3+4=7, 4+5=9) but I've been searching through the book and on the internet how to express this.
     
  2. jcsd
  3. Apr 12, 2012 #2
    Suppose the kth term is n(k)/d(k). Can you find a pattern to how the numerator and denominator change with k?
     
  4. Apr 12, 2012 #3
    I just figured it out. Apparently I just needed to finally ask for help.

    The equation is (i/2i-1) with start i=1 and end at 5.
     
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