Question

Distinguish Arithmetic vs. Geometric Sequences

Answer 1

@AZ

Answer 2

Arithmetic sequence means they're adding or subtracting by a constant number

Geometric sequence means they're multiplying or dividing by a constant number

Answer 3

So we have

2, 11, 20, ...

we go from 2 to 11

and then we go from 11 to 20

can you add the same number to get from 2 to 11 and then from 11 to 20

or are they multiplying by a number to go from 2 to 11 and then from 11 to 20?

Answer 4

Adding 9

Answer 5

Exactly! So since they're adding by a constant number, it's an arithmetic sequence

Answer 6

I'm not sure what the options are

but I'm assuming it probably says

common ratio or common difference

common difference is for arithmetic sequences

and this is that constant number that they're adding or subtracting by to get the next number

common ratio is for geometric sequences and it's that constant number that they're multiplying or dividing by to get the next number

Answer 7

and so you have all the information you already need

you said they're adding by a constant number

since you're adding that makes it an arithmetic sequence

and that number they're constantly adding by is the common difference

Answer 8

Thank you for the explanation

Answer 9

I thought I had it right? ):

Answer 10

It's being divided by 10

Answer 11

I'm so sure of this ahh

Answer 12

That's right!!

Answer 13

It says it's wrong, I have one more attempt

Answer 14

Oh wow it's supposed to be 1/10

Answer 15

whaaaa

how

Answer 16

This is so stupid

Answer 17

OH

Answer 18

): I was confident dang

Answer 19

okay so the way to find common ratio is to take the second term and divide it by the first

30/300 = 1/10

Answer 20

sorry about that :(

Answer 21

My mistake, not yours

Answer 22

no no, I should have caught it and realized );

Answer 23

It's okay, thank you for your help

Answer 24

Math is eating my brain, I need a shower break =)
Will you be here in about an hour or so? Free to help?

Answer 25

I shall most likely still be awake instead of sleeping haha :)

Answer 26

Okie dokie thanks :)

Answer 27

It's my pleasure, Maryam!!