Question

Which of the following are arithmetic sequences?

a. 1, 2, 3, 4, 5, 6, ...

b. 2, 2, 2, 2, 2, ...

c. 2, 6, 18, 54, ...

d. 100, 230, 360, 490, ...
*** check ALL that apply

Answer 1

first

Answer 2

Arithmetic means that the pattern is the same yes?

Answer 3

second

Answer 4

IF so, I have A and C so far cuz A is adding one each time and C is x3 right???

Answer 5

Idk is B an answer though?? I got confused on that because there is no change... idk could u pls explain ? :)

Answer 6

2 = 2+0

2 = 2+0

...

etc

So the common difference is 0

Answer 7

So 2, 2, 2, 2, 2, ... is an arithmetic sequence

Answer 8

And I have no idea about D.... But am i right that arithmetic means constant difference?

Answer 9

oh so B is an answer as well? :) Because +0 can be a difference?

Answer 10

yes

Answer 11

Oh cool! So far we have A,B, and C???? is that right?

Answer 12

arithmetic means adding and subtracting

Answer 13

c cant work

Answer 14

ohhhhh i seee (thanks!)

Answer 15

C is NOT an arithmetic sequence

Answer 16

6 - 2 = 4

but 18 - 6 = 12

so there is no common difference

Answer 17

ohhhh how come it's not?? is it cuz like you said it's only adding and subtraction?? so no multiplication?

Answer 18

cuz i got multiply by 3 as the common thingy...

Answer 19

that's the common ratio

Answer 20

so it means that C is a geometric sequence instead

Answer 21

ohhhh geometric means multiplication?? DOes that also include division?

Answer 22

And what about D? I couldn't find anything for D.... ;(

Answer 23

yes, multiplication and division are linked (since division is really multiplication of the multiplicative inverse)

Answer 24

oh i see now.... oh wait nvm... is D an arithmetic sequence cuz it's +130??? each time???

Answer 25

230 - 100 = ?

360 - 230 = ?

390 - 360 = ?

Answer 26

yes

Answer 27

So the answer to this question is A,B, and D?

Answer 28

oops, 490 - 360 = ?

Answer 29

yes, that's correct

Answer 30

oh okay!! I get it now!! :) Thanks!! :) Can i message u the next link when i post it in a bit? :)

Answer 31

oh and can u pls give @Jonask a medal for me @jim_thompson5910 ??? cuz i can only give one :(