Question

Which of the following is the formula for the geometric sequence?
3, 15, 75, 375 ...
Answer

an=3(5)n-1

an=5(3)n-1

an=12(3)n-1

an=5(12)n-1

Answer 1

@Shadowys

Answer 2

well the 1st term is 3 and the common ratio is 5

so

\[T_{n} = ar^{n -1}\]

is the formula for a term in a geometric series... substitute a = 3 and r = 5 into the formula to find the formula.

Answer 3

It would be A than (:

Answer 4

well you have all the information just substitute and trust your algebra skills.

Answer 5

@Shadowys is it A or B

Answer 6

I go with B campbell sir.

Answer 7

I did it on my sheet.

Answer 8

@Shadowys HELP

Answer 9

@nubeer can you confirm if it B

Answer 10

@jiteshmeghwal9 Is it B?

Answer 11

its not B option

Answer 12

Sorry.....

No idea but go with the tips given by @CarlosGP

Answer 13

So I'ma go with A or C

Answer 14

@nubeer Mis calculation it D

Answer 15

still wrong.. maybe read again the guidelines told by Campbell...

Answer 16

wow @ramirokool, you don't have a lot of confidence in your skills.

Answer 17

@campbell_st I know the answer A but no one won't confirm it..@nubeer Show step by step please.

Answer 18

@nubeer show me step by step I know it A

Answer 19

@jiteshmeghwal9 I GOT IT A

Answer 20

YESSSSSSSSSSSS LORD

Answer 21

ya its A

Answer 22

and it dont have any steps.. most step you need is done just find r and subsitute it.

Answer 23

Sorry bout that. I see you've got it. :)