Question

Which of the following is the formula for the geometric sequence?
2, 6, 18, 54, ...

Answer 1

A.)\[a _{n}= 3(2)^{n-1}\]
B.)\[a _{n}=2(4)^{n-1}\]
C.)\[a _{n}= 2(3)^{n-1}\]

Answer 2

I think it's C but I'm not sure...

Answer 3

You're right.

Answer 4

Cool, thanks :) Can you help me with another question on the same sequence?

Answer 5

What is it?

Answer 6

Give the tenth term in the geometric sequence.
2, 6, 18, 54, ...

Answer 7

Now you're simply plugging in 10 for n in the equation you just found.

Answer 8

Ohhh!!!! That's easy :p

Answer 9

Ikr? Not that bad, it's just unusual to see sequences in a formula form at first.

Answer 10

Well thanks for your help :)

Answer 11

Sure