Respostas

2014-02-16T11:48:00-03:00
P A (2,a2,a3,a4,a5,a6,a7,a8,a9,a10,a11,57)
57=2+(12-1)*r
r=55/11
r=5

(2,7,12,17,22,27,32,37,42,47,52,27)