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Exclamation mark

  1. Feb 24, 2009 #1
    What does the exclamation mark mean in calculus? For example, a question might ask for the sum of a series ((-1)^n)/n!.
     
  2. jcsd
  3. Feb 24, 2009 #2

    berkeman

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    Staff: Mentor

    In many math applications, it refers to the factorial:

    http://en.wikipedia.org/wiki/Factorial

    .
     
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