Question

Which sequences are geometric? Check all that apply.

–2.7, –9, –30, –100, ...
–1, 2.5, –6.25, 15.625, ...
9.1, 9.2, 9.3, 9.4, ...
8, 0.8, 0.08, 0.008, ...
4, –4, –12, –20, ...

Answer 1

find the common ratio for three terms taken two at a time .
if it is same then it is geometric.

Answer 2

Okay

Answer 3

Does geometric mean you multiply by the same number every time?

Answer 4

yes

Answer 5

Thank you

Answer 6

A is geometric correct

Answer 7

You multiply by 3.333.... every time

Answer 8

yes

Answer 9

I got A,B,E

Answer 10

Hint: there are 2 more

Answer 11

All of them are geometric?

Answer 12

Check out E

Answer 13

ok

Answer 14

I see! It doesn't multiply by the same number every time

Answer 15

-4/4 = ?
-4 / -12 = ??

Answer 16

right
B is correct

Answer 17

-4/4= -1

Answer 18

-4/-12 is 0.333...

Answer 19

Okay so not E

Answer 20

It is check all that apply so ab or b?

Answer 21

right

Answer 22

and d

Answer 23

because you multiply by 10 every time

Answer 24

No B is correct The common ratio for B is -2.5

Answer 25

But it is check all that apply so it's B for sure

Answer 26

D also - common ratio is 1/10

Answer 27

ok thank you!

Answer 28

yw

Answer 29

A is 3.333... so is that also the answer