Show that ( ) ( ) ( ) 1, , 1 , CnkCnkCnk + = − + .

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Show that $C(n,k)=C(n,n-k)$ :

$c(n,k)=\frac{n!}{k!(n-k)!}=\frac{n!}{(n-k)!(n-(n-k))!}=C(n,n-k)$

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Question ID: mtid-5-stid-8-sqid-1339-qpid-1077