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17 June, 06:11

What is the value of the fourth term in a geometric sequence for which a1 = 30 and r = 1/2?.

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  1. 17 June, 06:24
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    For a Geometric sequence:

    a n = a (n-1) * r

    In this case: a 1 = 30

    a 2 = 30 * 1/2 = 15

    a 3 = 15 * 1/2 = 7.5

    a 4 = 7.5 * 1/2 = 3.75 = 3 3/4

    Answer: The value of the fourth term is 3.75 or 3 3/4.
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