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Convergence question

  1. Oct 13, 2009 #1

    lom

    User Avatar

    [tex]\frac{(-1)^n}{(n!)^2z^n}\\[/tex]
    z is a complex number
    [tex]\frac{1}{R}=\lim_{n->\infty}\sqrt[n]{|c_n|}\\[/tex]
    [tex]\frac{1}{R}=\frac{1}{\sqrt[n]{(n!)^2z^n}}\\[/tex]

    what to do next?
     
  2. jcsd
  3. Oct 13, 2009 #2

    Mark44

    Staff: Mentor

    What's the question? How is the problem stated? This is information you're supposed to supply when you post a problem.
     
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