Given the following geometric sequence, find the 12th term: {2, -4, 8, …}. -4096 2048 4096 -2048

Question

Given the following geometric sequence, find the 12th term: {2, -4, 8, …}.

-4096
2048
4096
-2048

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Calantha 3 years 2021-07-18T18:34:07+00:00 2 Answers 11 views 0

Answers ( )

    0
    2021-07-18T18:35:07+00:00

    Use formula: an = a1 * r^(n-1)
    a1 = 2, r = -2
    a12 = 2 * -2^(12-1)
    a12 = 2 * -2^11
    a12 = 2 * -2048
    a12 = -4096

    Solution: -4096

    0
    2021-07-18T18:35:28+00:00

    Answer: -4096

    Step-by-step explanation:

    I just did the lesson

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