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9 October, 13:56

What is the nth term of the geometric sequence 4, 8, 16, 32, ... ?

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  1. 9 October, 14:02
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    Formula:

    a_n = a1 r^ (n-1)

    a1 is the first term = 4

    r = common ratio = 8/4 = 2

    so,

    a_n = 4 (2) ^ (n-1)

    or

    a_n = 2 (2) ^n
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