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anonymous

  • one year ago

The general term of a sequence is given. Determine whether the given sequence is arithmetic, geometric, or neither. If the sequence is arithmetic, find the common difference; if it is geometric, find the common ratio. an = 4n - 2 A. arithmetic, d = -2 B. geometric, r = 4 C. arithmetic, d = 4 D. neither

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  1. anonymous
    • one year ago
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    @cobra-strikes

  2. anonymous
    • one year ago
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    @dan815 @Hayleymeyer @cobra-strikes

  3. Hayleymeyer
    • one year ago
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    oh wow o_o

  4. anonymous
    • one year ago
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    yep this is pre calc 12 grade math haha

  5. anonymous
    • one year ago
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    @ganeshie8

  6. Hayleymeyer
    • one year ago
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    man, i get help you with that XD, are you good in spanish?

  7. anonymous
    • one year ago
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    yes

  8. Hayleymeyer
    • one year ago
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    omg i love you! can you please help?!

  9. anonymous
    • one year ago
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    after my quiz breh

  10. anonymous
    • one year ago
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    @paki @Ashleyisakitty

  11. anonymous
    • one year ago
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    what is a1? what is a2? what is a3? what do the terms change by each time?

  12. anonymous
    • one year ago
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    idk

  13. anonymous
    • one year ago
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    when n=1 what is a1? plug in 1 and find out

  14. anonymous
    • one year ago
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    is it 2

  15. anonymous
    • one year ago
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    and how did you get that?

  16. anonymous
    • one year ago
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    i plug in one

  17. anonymous
    • one year ago
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    4(1) - 2 = 4 - 2 = 2. so what is a2?

  18. anonymous
    • one year ago
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    idk this is so confusing

  19. anonymous
    • one year ago
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    4(2) - 2 = ?

  20. anonymous
    • one year ago
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    -6

  21. anonymous
    • one year ago
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    -6? 4(2) -2 = 8 - 2 = ?

  22. welshfella
    • one year ago
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    the nth term of arithmetic sequence an = a1 + d(n-1) where d = common difference and a1 = first term

  23. anonymous
    • one year ago
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    now that makes more sence

  24. anonymous
    • one year ago
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    @cobra-strikes

  25. welshfella
    • one year ago
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    compare that general form to an = 4n - 2

  26. anonymous
    • one year ago
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    ok and what do you mean by that

  27. welshfella
    • one year ago
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    an = a1 + d(n -1) an =(a1 - d) + dn an = -2 + 4n

  28. welshfella
    • one year ago
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    comparing coefficients d = ?

  29. anonymous
    • one year ago
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    -2

  30. anonymous
    • one year ago
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    @welshfella

  31. welshfella
    • one year ago
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    i guess that looks a bit confusing with the repeated d but its the last d which gives the common difference so d = 4

  32. welshfella
    • one year ago
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    a1 - d = -2 so if d = 4 a1 = 2 = first term

  33. welshfella
    • one year ago
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    the sequence is arithmetic 2 , 6 , 10 .....

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