Por Daniel Ferreira em 16/10/2014 23:41:00
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
Por Maria Kayllane em 28/10/2020 01:41:49
C n,p = n!/p!(n-p)!
C n,p = 9!/3!(9-3)!
C n,p = 9/3!(6!)
C n,p = 9x8x7×6!/3!(6!)
Corta o 6!
C n,p = 504/3x2x1
C n,p = 504/6
C n,p = 84
C n,p = 9!/3!(9-3)!
C n,p = 9/3!(6!)
C n,p = 9x8x7×6!/3!(6!)
Corta o 6!
C n,p = 504/3x2x1
C n,p = 504/6
C n,p = 84