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anonymous

  • one year ago

Find the 5th term of the sequence in which t1 = 8 and tn = -3tn-1.

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  1. Michele_Laino
    • one year ago
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    If I rewrite your formula with n=2, I get this: \[\Large {t_2} = - 3{t_1}\]

  2. Michele_Laino
    • one year ago
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    so, what is t_2 ?

  3. anonymous
    • one year ago
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    t2=-24

  4. Michele_Laino
    • one year ago
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    correct!

  5. Michele_Laino
    • one year ago
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    now, if I rewrite your formula with n=3, I get this: \[\Large {t_3} = - 3{t_2}\]

  6. Michele_Laino
    • one year ago
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    what is t_3

  7. anonymous
    • one year ago
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    72

  8. anonymous
    • one year ago
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    t4=-216 t5=648

  9. Michele_Laino
    • one year ago
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    correct!

  10. Michele_Laino
    • one year ago
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    those numbers are a geometric sequence whose constant is equal to -3

  11. anonymous
    • one year ago
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    okay.

  12. Michele_Laino
    • one year ago
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    :)

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