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Homework Help: A caculus question concerning limits

  1. Feb 4, 2009 #1
    Ok so i came upon this question and i have no idea what to do!!


    x^n-a^n / x - a

    the answer is na^n-1
  2. jcsd
  3. Feb 4, 2009 #2


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    Science Advisor
    Homework Helper

    l'Hopital's rule is pretty handy here. Do you know that?
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