Question

What is the sum of the geometric series 6(2)n?
the picture goes with the numbers

Answer 1

hi friend, I cannot see the function after the sum, can you re-write it clearer? i am not sure whether i can help or not, but i will try

Answer 2

hii :) you can't see the picture?

Answer 3

the pic just show the sum from 1 to 10, i cannot see the a(n)

Answer 4

that part is the 6(2)n i couldnt include it witht he picture

Answer 5

you mean 6*2^n?

Answer 6

yeah

Answer 7

ok, let me try, if i cannot, i will tell you then,

Answer 8

okay :)

Answer 9

do you have book with you, can you check whether the answer is 122760 ,

Answer 10

no but i see that as an answer so i'll choose it, your guess is better than mine

Answer 11

well i see something close to that

Answer 12

I don't guess, I just expand the sum. since you have a(n) = 6*2^n. so when n=1, a(1) = 6*2^1
n=2 , a(2) = 6*2^2
n=3, a(3) = 6* 2^3
...... and so on. until I get n =10 , a(10) = 6*2^10. and then i make the sum of a1 + a2 +.....+a10. that is my calculate . but it doesn't work, I'm sorry, I cannot help

Answer 13

wrong copy, it is just 12276

Answer 14

oh okay i thank you for all your help. Thank you i think you got the right answer though

Answer 15

really? thanks god.

Answer 16

yeah there is a answer choice that is 12276 and other ones are just off