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23 July, 06:43

What is the common ratio of the sequence?

-2, 6, - 18, 54, ...

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  1. 23 July, 07:05
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    A1=-2

    a2=6

    a3=-18

    the common ratio musbe negative since the signs alternate

    it is multiilied by 3 ach time

    comon ratio is - 3

    an=-2 (-3) ^ (n-1)
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