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Math Help - Finding the interval of convergence

  1. #1
    Member
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    May 2008
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    Finding the interval of convergence

    Hi,
    I'm having some trouble with the task of finding the convergence interval of the following series:

    \sum_{n=0}^\infty \frac{n^2 - n + 1}{n!}x^n
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  2. #2
    Math Engineering Student
    Krizalid's Avatar
    Joined
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    Santiago, Chile
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    try to use the ratio test.
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