Daniel Ferreira
16/10/2014 • 23:41
Trata-se de um problema envolvendo COMBINAÇÃO!
C_{9, 3} = (9!):(3! 6!)
C_{9, 3} = (9 . 8 . 7 . 6!):(6! 3 . 2 . 1)
C_{9, 3} = (3 . 4 . 7):(1)
C_{9, 3} = 84
C_{9, 3} = (9!):(3! 6!)
C_{9, 3} = (9 . 8 . 7 . 6!):(6! 3 . 2 . 1)
C_{9, 3} = (3 . 4 . 7):(1)
C_{9, 3} = 84