Which equation would generate the arithmetic sequence: -8.-3.2.7.12. A 5-8(n-1) B = -8+5(n-1) C None of t

Question

Which equation would generate the arithmetic sequence: -8.-3.2.7.12.

A 5-8(n-1)

B = -8+5(n-1)

C None of the other answers are correc

D = -8-5(1-1) a = 5+8(n-1)​

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Thành Đạt 5 years 2021-08-28T10:42:41+00:00 1 Answers 31 views 0

Answers ( )

  1. linhdan
    0
    2021-08-28T10:44:07+00:00
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    Answer: B

    Step-by-step explanation:

    The equation for an arithmetic sequence is:

    aₙ = a₁ + d(n – 1)

    This matches answer B, so lets test it.

    Substitue the position values for n

    Given: Position 1 = -8

    Solve Position 2:

    a₂ = -8 + 5(2 – 1) = -3

    a₃ = -8 + 5(3 – 1) = 2

    a₄ = -8 + 5(4 – 1) = 7

    a₅ = -8 + 5(5 – 1) = 12

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