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6 January, 00:56

Is the following sequence geometric? If so, what is the common ratio?

1, 3, 6, 18, 36, ...

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Answers (2)
  1. 6 January, 02:47
    0
    Yes

    Step-by-step explanation:

    Multiply 1 by 3 (1.3=3) Then the result you multiply by 2 (you alternate multiplying by 3 then by 2 then by 3 ...

    1 * 3 = 3

    3 * 2 = 6

    6 * 3 = 18

    18 * 2 = 36
  2. 6 January, 04:31
    0
    No

    Step-by-step explanation:

    For the sequence to be geometric a common ratio r must exist between consecutive terms.

    3 : 1 = 3

    6 : 3 = 2

    18 : 6 = 3

    36 : 18 = 2

    The ratio between consecutive terms is not equal thus not geometric.
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