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Homework Help: Functions as Power Series

  1. May 14, 2009 #1
    1. The problem statement, all variables and given/known data
    I'm having a little trouble concerning the part where we have to calculate the endpoints of a known interval of convergence in order to see whether they are convergent or divergent. In this case, is the summation of n=0 to infinity of (-1)^n/10 diverging or converging. Are there any tests to prove that? I'm kinda confused. Thanks


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. May 14, 2009 #2

    Mark44

    Staff: Mentor

    Have you looked at the alternating series test?
     
  4. May 14, 2009 #3
    uhh yea, but it just gives bn= 1/10 which doesn;t make sense...i think
     
  5. May 14, 2009 #4

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    (-1)^n/10 doesn't converge. Don't be silly. It doesn't even approach 0. Did you mean to post something else?
     
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