Respostas

2014-06-09T15:40:20-03:00
______8!_______
(p + 2)! (8 - p - 2)!
-----------------------------
_______8!_______
(p + 1)! (8 - p - 1)!

_______8!_______
(p + 2)! (6 - p )!
-----------------------------
_______8!_______
(p + 1)! (7 - p)!

(p + 2)! (6 - p )!
----------------------
(p + 1)! (7 - p)!

(p + 2) (p + 1)! (6 - p )!
--------------------------------------...
(p + 1)! (7 - p)(6 - p ) !

p + 2
-------- = 2
7 - p

p + 2 = 14 - 2p
p + 2p = 14 - 2
3p = 12
p = 12/3
p = 4