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17 November, 10:09

What is the 9the term of the sequence?

3,-12,48,-192

A. 196,608

B. 786,432

C. - 196,608

D. - 786,432

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Answers (2)
  1. 17 November, 11:57
    0
    Answer

    A. 196,608

    Step-by-step explanation:

    -12/3 = - 4

    48 / - 12 = - 4 and - 192 / 48 = - 4

    This is a geometric sequence with common ratio - 4.

    an = a1 r^ (n - 1) so:-

    9th term (a9) = 3 * (-4) ^ (9-1)

    = 196,608
  2. 17 November, 13:33
    0
    A. 196,608

    It's not hard.
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