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27 October, 18:14

What is the value of the fourth term in a geometric sequence for which a1=15 and r=1/3

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  1. 27 October, 18:44
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    Formula: an = a1 (r) ^n-1

    n = term number

    a1 = first term

    r = rate

    Plug our values in:

    n = 4

    a1 = 15

    r = 1/3

    a4 = 15 (1/3) ^4-1

    a4 = 15 (1/3) ^3

    a4 = 15 (1/27)

    a4 = 0.5555555556

    a4 = 0.6 to the nearest tenth
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