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Stirling's approximation

  1. Apr 23, 2003 #1
    I was wondering how Stirling's approximation

    x! ~ sqrt(2[pi]x)xxe-x

    was derived. Anyone know?
     
  2. jcsd
  3. Apr 23, 2003 #2
    This article at Mathworld derives Stirling's approximation step by step. :smile:
     
  4. Apr 24, 2003 #3
    Thanks for the link, Jeff. It helped a lot :smile:
     
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