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23 June, 07:36

Find the 9th term in the following geometric sequence ... round your answer to the nearest tenths ... 5,8.5,14.45,24.565.

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Answers (2)
  1. 23 June, 07:42
    0
    Common ratioo = 8.5 / 5 = 1.7 9th term = ar^ 9-1 = 5 * 1.7 ^ 8 sorry i havent got my calculator to work this out
  2. 23 June, 07:47
    0
    The geometric sequence:

    a 1 = 5, a 2 = 8.5, a 3 = 14.45, a 4 = 24.565, ...

    r = 8.5 / 5 = 1.7

    a n = a 1 * r^ (n-1)

    a 9 = 5 * 1.7^ (8) = 5 * 69.757574

    a 9 = 348.7878205 ≈ 348.8
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