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14 May, 08:47

21,42,126,504 If it is a geometric sequence, choose the common ratio. If it is not a geometric sequence, choose "not geometric.

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  1. 14 May, 11:41
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    Not geometric

    Step-by-step explanation:

    In a geometric sequence, each term is multiplied by a common ratio to get the next term.

    So if this is a geometric sequence, then dividing each term by the one before it should result in the same common ratio.

    42 / 21 = 2

    126 / 42 = 3

    504 / 126 = 4

    The ratios are different. This is not a geometric sequence.
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