Question

Find the sum of the geometric sum: 12+36+108+ ... + 78,732

Answer 1

A. 354,288

Answer 2

B. 118,092

Answer 3

C. 39,360

Answer 4

D. 1,062,876

Answer 5

HELP

Answer 6

@phi

Answer 7

phi guess what

Answer 8

do u know the formula for sum of geometric series ?

Answer 9

no i dont math man

Answer 10

do you?

Answer 11

it is
\(\large \begin{align} \color{black}{Sn=\dfrac{a(1-r^n)}{1-r}\\~\\
}\end{align}\)

find \(a=\)first term

\(r=\dfrac{2^{nd}term}{1^{st}term}\)=common ratio

\(n\) =number of terms

Answer 12

what did you get

Answer 13

im guessiong option d

Answer 14

i dont know answer

Answer 15

my experience tells me that it is that A option

Answer 16

u can find that by finding a,r and n.

Answer 17

yes but i wana compare answers

Answer 18

you get yous and I'll tell you mine!

Answer 19

Find the sum of the geometric sum: 12+36+108+ ... + 78,732