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Compute

\(\frac{(N-1)!(N)}{(N+1)!}.\)

 Oct 20, 2019
 #1
avatar+105452 
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\frac{(N-1)!(N)}{(N+1)!}.

 

\(\frac{(N-1)!(N)}{(N+1)!}\\ =\frac{(N-1)!(N)}{(N-1)!N(N+1)}\\ =\frac{1}{N+1}\)

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 Oct 20, 2019

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