Respostas

2014-06-21T16:12:50-03:00
N = 2d
d = n.(n-3)/2
d = 2d (2d-3)/2
2d = 2d (n-3) dividindo por 2d, temos
1 = 1(n-3)
1 = n-3
n = 3+1
n = 4
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