Question

PLEASE HELP!!! MEDAL!!
Below are five number sequences. Which ones are geometric sequences?

a. 1/3, 2/9, 3/274, 4/81, 5/343....
b. 3, -15, -33, -51, -69...
c.3, -12, 48, -192, 768.....
d. 1, 1/2, 1/4, 1/8, 1/16....
e. 2, 3, 5, 9, 17...

Answer 1

i made a mistake on letter a.. its supposed to be 3/27 not 3/274

Answer 2

I think there 1 or more answers

Answer 3

Divide each number in the sequence by the number before it. If the numbers in the same list result in the same thing, it is a geometric sequence.

Answer 4

I dont get it

Answer 5

I dont get it

Answer 6

For example. The first sequence: 1/3, 2/9, 3/27, 4/81, 5/343

2/9 divided by 1/3 = 2/3
3/27 divided by 2/9 = 1/2

2/3 \(\neq\) 1/2, so that is not a geometric sequence.

Understand the process now?

Answer 7

Yes thank you @studygurl14