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anonymous

  • one year ago

HELP ME Which of the following recursive formulas represents the same geometric sequence as the formula an = 3 • 3n - 1? A. an = 9 + an - 1 B. an = 3 + an - 1 C. an = 3 • an - 1 D. an = 9 • an - 1

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  1. anonymous
    • one year ago
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    @peachpi

  2. anonymous
    • one year ago
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    @welshfella

  3. anonymous
    • one year ago
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    is that an = 3*3*n-1? doesn't look like it

  4. anonymous
    • one year ago
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    its 3*3^n-1

  5. anonymous
    • one year ago
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    you mean 3*3^(n-1)

  6. anonymous
    • one year ago
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    yea

  7. anonymous
    • one year ago
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    well, geometric series is define as a(n) = r * a(n-1), where r is the common ratio

  8. anonymous
    • one year ago
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    r is 3

  9. anonymous
    • one year ago
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    yes

  10. anonymous
    • one year ago
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    so its either b or c

  11. anonymous
    • one year ago
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    what is the first term of the sequence?

  12. anonymous
    • one year ago
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    3?

  13. anonymous
    • one year ago
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    actually it doesn't matter. It's B

  14. anonymous
    • one year ago
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    thx

  15. anonymous
    • one year ago
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    SORRY IT'S C!!

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