Question

What is the sum of the first eight terms of a geometric series whose first term is 3 and whose common ratio is 1/2 ?

Answer 1

it would be 3, 6, 12, 24, 48 .... so just keep going and add the first 8

Answer 2

First *(ratio)^(term number)

3*(1/2)^t

Answer 3

if t=0, you get 3, t=1 you get 3*1/2 , t=2 you get 3* 1/2 * 1/2

so on...

Answer 4

each next term is half of the previous term

Answer 5

3, 3/2, 3/4, 3/8 .....

Answer 6

here is a little thing http://www.regentsprep.org/Regents/math/algtrig/ATP2/GeoSeq.htm

Answer 7

answer choices
A)3/128
B)255/128
C)765/128
D)255/256