Respostas

2014-03-19T21:51:08-03:00
2,4,8,16,32,64,128,256....
-2,-4,-8,-16,-32,-64,-128....

2014-03-19T21:53:18-03:00
A ) an= ª1.Q ^n-1

6 = 2 . 2 ^6-1

6 = 2.2^5

6 = 2.32

6 = 64

B) an= ª1.Q ^n-1

6 = -2.2^6-1

6 = -2 . 2^5 

6 = -2. 32

6 = - 64