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30 January, 08:21

Which sequence is geometric and has 14 as its fifth term and 12 as the common ratio?

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  1. 30 January, 12:18
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    Geometric sequence is

    an=a1 (r) ^ (n-1)

    an=nth erm

    a1=first term

    r=common ratio

    5th term=14

    a5=a1 (12) ^ (5-1) = 15

    a1 (12) ^4=15

    a1 (20736) = 15

    divide both sides by 20736

    a1=15/20736=5/6912

    geometric sequence is

    an = (5/6912) (12) ^ (n-1)
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