Find the 9th term of the geometric sequence 5, -25, 125, …

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Find the 9th term of the geometric sequence 5, -25, 125, …

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Thu Thủy 4 years 2021-07-27T12:57:05+00:00 1 Answers 22 views 0

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  1. MichaelMet
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    2021-07-27T12:58:11+00:00
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    Answer:

    Step-by-step explanation:

    a = 5

    r = -5

    n = 9

    t_9 = a r^(n – 1)

    t_9 = (-1)^n*5 (-5) ^ 8

    t_9 = (-1)^9 *  5 *  (-5) ^8

    t_9 = -1 ( 1953125)

    t_9 = – 1953125

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