Respostas

2014-06-12T22:21:35-03:00
Pg-  a razao da pg se acha dividindo o a2 pelo a1
a) 2, 8   ....      logo   q=4     pg =( 2,8,32.......)

b) ( 1 , 2   razao 2   pg=( 1,2,4....)

c) -10, 30   r. -3     pg = ( -10,,30, -90...)  pg alternativa.
2 2 2
2014-06-12T22:22:41-03:00
a)(2,8,  ,  ,  )
q = 8/2 = 4
PG ( 2, 8, 32, 128, 512)
..................
b)(1,2,  ,  ,   )
q = 2/1 = 2
PG (1, 2, 4, 8, 16)
..................
c) (3,9,  ,  ,   )
q = 9/3 = 3
PG (3, 9, 27, 81, 243)
...................
d) (-10,30,  ,  ,  )
q = 30/-10 = -3
PG (-10, 30, -90, 270, -810)
4 3 4