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17 October, 11:25

What is the common ratio in this geometric sequence 3,-6,12,-24,48

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  1. 17 October, 11:32
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    The common ratio refers to the number that multiplies the previous term to get the next term.

    For me, - 2 pops out as the answer. Let's test it out.

    First, multiply - 2 by 3.

    3 * - 2 = - 6

    Now we have our second term and it matches up with - 6 in 3,-6,12,-24,48.

    Now multiply it again by - 2.

    -6 * - 2 = 12

    Yup, we can say - 2 is the answer to this question.
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