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Alternating Series

  1. Feb 21, 2010 #1
    I'm confused as to how to find an+1. I can figure out how to find the limit of an, which is the first component of the alternating series test. How do you find an+1? I'm thinking you just plug in "n+1" for "n" is that right?
  2. jcsd
  3. Feb 21, 2010 #2


    Staff: Mentor

    If you're working with a summation, you have a formula for an. If you want an+1, substitute n+1 instead of n in the formula for an.
  4. Feb 21, 2010 #3
    Thank you!!! According to the back of the book I got the right answer. YES!!
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