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13 December, 15:52

In geometric sequence the 4th term is 54 the 7th term is 1458 what is the 12th term

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  1. 13 December, 17:03
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    Let the common ratio be r.

    a4=54

    a7=1458

    r^3=1458/54=27

    r=27^ (1/3) = 3

    therefore

    a12=a7*r (12-7) = a7*3^5

    =354294
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