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2014-05-18T14:06:24-03:00
An=a1*r^n-1
r=a2/a1
r=256/512
r=1/2

a6=512*1/2^6-1
a6=512*1/32
a6=16
2 3 2
2014-05-18T14:07:31-03:00
512.1/2 =256.1/2=128.1/2=64.1/2=32.1/2=16