Question

Find an equation for the nth term of the arithmetic sequence

8,6,4,2...

Answer 1

8,6,4,2,0,-2,-4,-6,8
.....everyone agree?

Answer 2

Yeah

Answer 3

These are my options

Answer 4

@bingtamekia @LunyMoony

Answer 5

Oh, I see ok

Answer 6

I think D

Answer 7

how did you get D @bingtamekia

Answer 8

I was gonna say D too, it is the only one with a positive 2

Answer 9

common difference is 2

Answer 10

and so it has to be anything 8 or about, and D is the only one with that

Answer 11

oh okay that makes sense. is there like a formula i can use ?

Answer 12

yeah, here ....
http://www.virtualnerd.com/worksheetHelper.php?tutID=Alg1_10_1_26

Answer 13

so what would -20, -16, -12, -8, ... be ?

Answer 14

common difference is 4, and that is positive 4 because the numbers are going towards down towards the positive numbers

Answer 15

so nth term can be -4th and up I believe

Answer 16

if I am wrong just correct me, sometimes Im not even sure

Answer 17

Well these are my options, this seems really tricky to me

Answer 18

sec ...

Answer 19

I believe D, since it is the only one that comes out as the rounded common number ....which is 4. so 4 is our first nth term

Answer 20

nah that wasnt it but its okay haha thank you so much for helping @LunyMoony

Answer 21

sorry, alright!