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anonymous

  • one year ago

Find an equation for the nth term of the arithmetic sequence 8,6,4,2...

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  1. LunyMoony
    • one year ago
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    8,6,4,2,0,-2,-4,-6,8 .....everyone agree?

  2. anonymous
    • one year ago
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    Yeah

  3. anonymous
    • one year ago
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    These are my options

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  4. anonymous
    • one year ago
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    @bingtamekia @LunyMoony

  5. LunyMoony
    • one year ago
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    Oh, I see ok

  6. anonymous
    • one year ago
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    I think D

  7. anonymous
    • one year ago
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    how did you get D @bingtamekia

  8. LunyMoony
    • one year ago
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    I was gonna say D too, it is the only one with a positive 2

  9. LunyMoony
    • one year ago
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    common difference is 2

  10. LunyMoony
    • one year ago
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    and so it has to be anything 8 or about, and D is the only one with that

  11. anonymous
    • one year ago
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    oh okay that makes sense. is there like a formula i can use ?

  12. LunyMoony
    • one year ago
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    yeah, here .... http://www.virtualnerd.com/worksheetHelper.php?tutID=Alg1_10_1_26

  13. anonymous
    • one year ago
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    so what would -20, -16, -12, -8, ... be ?

  14. LunyMoony
    • one year ago
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    common difference is 4, and that is positive 4 because the numbers are going towards down towards the positive numbers

  15. LunyMoony
    • one year ago
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    so nth term can be -4th and up I believe

  16. LunyMoony
    • one year ago
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    if I am wrong just correct me, sometimes Im not even sure

  17. anonymous
    • one year ago
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    Well these are my options, this seems really tricky to me

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  18. LunyMoony
    • one year ago
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    sec ...

  19. LunyMoony
    • one year ago
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    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

  20. anonymous
    • one year ago
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    nah that wasnt it but its okay haha thank you so much for helping @LunyMoony

  21. LunyMoony
    • one year ago
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    sorry, alright!

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