Question

What is the sum of a 6–term geometric series if the first term is 20 and the last term is 336,140?

392,160
411,768
372,552
431,376

Answer 1

\[\frac{6}{2}(20 + 336,140)\]

Answer 2

1068.42

Answer 3

Hello Lahore! xD

Answer 4

Lahori?

Answer 5

saeed ajmal is from Lahore?

Answer 6

You are from Lahore.
idk about Ajmal.
im not not that much into cricket.

Lahori was a typo. =)

Answer 7

oh..no im from Karachi...

Answer 8

Wait. u said u are from Lahore! :O

Answer 9

no i didnt...

Answer 10

how did you get 1068.42 i dont get it

Answer 11

Lie detection!

Answer 12

I have been there..but i am from karachi..

Answer 13

:O

Answer 14

Girls change their mind so often.. sign..

Answer 15

Your prolly thinking of someone else

Answer 16

i am from london now someone tell me please =(

Answer 17

uh oh i read that mathematics series, sorry

Answer 18

sigh*

Answer 19

Nope, it was you!! i remember very clearly..

Answer 20

why would I lie about being from lahore? pstch Karachi is like awesome..

Answer 21

ugh auto-correct, arithmetic not mathematics

Answer 22

geometric series

Answer 23

Although, my grandfather was from India.I am half indian and half Paki...but more on Paki side cuz both my parents are from Karachi

Answer 24

\[20 \times \frac{1 - r^7}{1 - r}\]
\[r^5 = \frac{336,140}{20}\]

Answer 25

16,807

Answer 26

Same here, my grandies are from India as well. =D

Correct, Khi is Awesome!

Answer 27

and its the opposite for me mine were from pakistan lol

Answer 28

thts cool..lol @lilg132

Answer 29

LOL @lil

Answer 30

Sorry Sum should be \[20 \times \frac{1 - r^6}{1 - r}\]

Cool!@Saifoo, whatevs and lilg

Answer 31

ugh I am confused please ignore me and my posts

lilg and saifoo please help whatevs


//something is wrong with me today :-/

Answer 32

I am confused too..its ok Ishaan..thanks for helping...I'll just go with the first option..

Answer 33

its 4 in the morning for me and i think that maths is getting to me ahaha see you all next time :p gdnightt

Answer 34

goodnight..