Question

cinco primeiros termos d pg 2/3 e q=1/10

Answer 1

a1 = 2/3

a2 = 2/3 . 1/10 = 2/30 = 1/15

a3 = 1/15 . 1/10 = 1/150

a4 = 1/150 . 1/10 = 1/1500

a5 = 1500 . 1/10 = 1/15000


PG (2/3; 1/15; 1/150; 1/1500; 1/15000)

Answer 2

an=2/3.1/10^5-1

an=2/3.1/10^4
an=2/3.1/10.000
an=2/30.000  : 2  = 1/15.000

2/3 . 1/10 = 2/30 = 1/15
 1/15 . 1/10 = 1/150
 1/150 . 1/10 = 1/1500
1500 . 1/10 = 1/15000

(2/3; 1/15; 1/150; 1/1500; 1/15000)