Question

How do you find the sum of this geometric series:

Answer 1

\[\sum_{n-1}^{10?}6(2)^{n}\]

Answer 2

is that n =1 or n-1?

Answer 3

Pretty sure it's 1...

Answer 4

n=1

Answer 5

@Dido525 just trying to clean things up ya know?
@onelove94 just do it term by term

Answer 6

it is n-1

Answer 7

okay............

Answer 8

Well then...

Answer 9

yeah...that's why I am confused

Answer 10

got like a screenshot or sth?

Answer 11

I know the answer is 12, 276...I am suppose to be correcting this problem and explaining why it is that answer but I just don't understand it....all the problems in my book are n=a number, not n- ... I don't know, maybe it was a typo

Answer 12

yeah, so try using n=1 and let us hear what you get.

Answer 13

I got 30,780

Answer 14

no, I got the answer at the back.....not what you got.....

Answer 15

what? sorry...

Answer 16

how did you do the sigma?

Answer 17

I have no clue....I looked in my book and tried my hardest to piece it all together :/

Answer 18

okay, a sigma works this way: simply plug in the first n =1, then n=2 and add each evaluation until the top n= 10.