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

Question

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

in progress 0
Thu Thủy 5 years 2021-07-27T12:57:05+00:00 1 Answers 24 views 0

Answers ( )

  1. MichaelMet
    0
    2021-07-27T12:58:11+00:00
    Reply

    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

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )