Given the sequence {2,-1,-4,-7} find a25

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Given the sequence {2,-1,-4,-7} find a25

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Nem 5 years 2021-08-18T05:35:22+00:00 1 Answers 24 views 0

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  1. Neala
    0
    2021-08-18T05:36:36+00:00
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    Answer:

    -70

    Step-by-step explanation:

    This is an arithmetic progression with a difference of -3

    Formula for AP is

    Sn = a + (n – 1) d

    Where

    a is the first term, 2

    n is the term we’re looking for, 25

    d is the arithmetic difference, -3

    a25 = 2 + (25 – 1) -3

    a25 = 2 + (24) -3

    a25 = 2 – 72

    a25 = -70

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