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Exercício de análise combinatória
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Rodrigo S Melo
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Mar 11, 2011, 11:54:54 AM
3/11/11
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Oi, vê esse aqui...
4! . (x-1)! = 3! .
x!
---- primeiro deve-se fatoriar o x! até o (x-1)! certo?
24 .
(x-1)!
= 6 . x .
(x-1)!
---- agora podemos simplicar os termos (x-1)! ?
24 = 6 . x ---- 24 / 6 = x ---- x = 4
certo??
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