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Re: [obm-l] pergunta do aluno

C(n,k)=C(n,n-k)=60.
C(n-1,k-1)=18
 
Mas
 
C(n,k)=C(n-1,k)+C(n-1,k-1), donde C(n-1,k)=60-18=42.
 
Paulo
----- Original Message -----
From: nilton rr
Sent: Tuesday, August 10, 2004 10:20 AM
Subject: [obm-l] pergunta do aluno

Companheiros essa pergunta foi feita por um dos meus alunos ,peço ajuda pois não consegui resolver:
 
 
Sabendo que C(n-1, k-1) = 18 e C(n, n-k) = 60, calcule C(n-1, k). Grato

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