Find the 12th term of the geometric sequence 1, -2, 4,..

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Find the 12th term of the geometric sequence 1, -2, 4,..

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Farah 4 years 2021-08-17T19:14:53+00:00 1 Answers 7 views 0

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  1. thugiang
    0
    2021-08-17T19:16:24+00:00
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    this means each time we are multiply in by -2
    First term = 1
    Second term = -2
    Third term = 4
    Fourth term = -8
    Fifth term = 16
    Sixth term = -32
    Seventh term = 64
    Eighth term = -128
    Ninth term = 256
    Tenth term = – 512
    Eleventh term = 1024
    Twelfth term = -2048

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