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Homework Help: Is this correct please - series

  1. May 24, 2006 #1
    Is this correct please:


    (a_n+1 / a_n) = ((n+1)^3 * 4^(n+1) / (3 (n+1)!)) * (3(n!) / (n^3 * 4^n))

    is all this equal to

    (4 * (n+1)^2 * n!) / n^3
     
  2. jcsd
  3. May 24, 2006 #2

    TD

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    Homework Helper

    Almost, I think the n! is too much :smile:
     
  4. May 24, 2006 #3
    I don't think you should end up with a factorial.
     
  5. May 24, 2006 #4
    So this must be the answer, right?

    (4 * (n+1)^2) / n^3
     
  6. May 24, 2006 #5
    Looks good to me!
     
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