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Calculus: Absolute/Conditional Convergence or Divergence Question!

  1. Jun 15, 2013 #1
    1. The problem statement, all variables and given/known data

    This is the problem:


    its the first series, not the second one with the cos

    2. Relevant equations

    3. The attempt at a solution

    so anyways i did this question but i just had one doubt. in every other question like this that i've done, the series summation goes from n=1 or something and goes to infinity. in this question, the summation starts at n=2 and goes to...just n. so can i solve this just as if the summation was going to infinity or do i have to do it differently?

  2. jcsd
  3. Jun 15, 2013 #2


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    That is undoubtedly a typo and should go to infinity. There would be no notion of convergence for a finite number of terms plus it makes no sense for an index to go to itself.
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