Respostas

2014-06-08T13:10:23-03:00
A) 6! = 6 x 5 x 4 x 3 x 1 = 720
b) 7!/4! = (7 x 6 x 5 x 4!) / 4! = 7 x 6 x 5 = 210
c) 500!/499! = (500 x 499!) / 499! = 500
d) 5!/2!2! = (5 x 4 x 3 x 2!)/2!2! = (5 x 4 x 3)/2! = (5 x 4 x 3)/(2 x 1) = 30