Question

What is the sum of the geometric sequence 1, 3, 9, … if there are 12 terms?

292,524

265,720

139,968

104,976

Answer 1

ooh i like these

Answer 2

a=1


r*a^0+r*a^1+r*a^2...

Answer 3

oh wait switch a and r the r has the ^ not the a

Answer 4

\[S = {1 - r^n \over 1 - r} \]

Answer 5

B?

Answer 6

265720

Answer 7

YES :)

Answer 8

yay!! Thank you :)