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Factorial simplification problem

  1. Oct 20, 2011 #1
    1. The problem statement, all variables and given/known data
    In my calculus book they have the following simplification:

    [itex]\frac{k!}{(k+1)!}[/itex] = [itex]\frac{1}{k+1}[/itex]

    I do not quite understand how that's occured.
     
  2. jcsd
  3. Oct 21, 2011 #2

    PAllen

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    Science Advisor
    Gold Member

    Have you tried simply writing out the numerator and denominator from the factorial definition?
     
  4. Oct 21, 2011 #3
    Doh!
     
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