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Power series help

  1. Dec 6, 2011 #1
    1. The problem statement, all variables and given/known data
    My professor says that the integral test is supposed to help me figure out the interval of convergence of this equation:
    Ʃ(2n*(x+1)n)/(n*ln(n))


    2. Relevant equations
    integral test


    3. The attempt at a solution
    i couldn't figure out what the power series was after i differentiated the first few terms of it.
     
  2. jcsd
  3. Dec 6, 2011 #2
    Why can't i edit my original post? anyways the power series goes from 2 to infinity
     
  4. Dec 7, 2011 #3
    am i going about this even the right way? please someone i beg you to help me , i have my final tomorrow and this was the last practice problem and i really am worried that something of this caliber will be on the final.
     
  5. Dec 7, 2011 #4
    pict
     

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  6. Dec 7, 2011 #5

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Being in a panic doesn't help. You don't need an integral test to find a basic interval of convergence. A ratio test will do fine. An integral test may help at the endpoints though.
     
  7. Dec 7, 2011 #6
    omg i misunderstood everything, wow i should do the problem before i read emails, thank you for clearing that up
     
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