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23 August, 14:03

The formula for any arithmetic sequence is an = a1 + d (n - 1), where an represents the value of the nth term, a1 represents the value of the first term, d represents the common difference, and n represents the term number. What is the formula for the sequence 10, 8, 6, 4, ... ?

an = 10 + 2 (n - 1)

an = 2 + 10 (n - 1)

an = - 2 + 10 (n - 1)

an = 10 + (-2) (n - 1)

+2
Answers (2)
  1. 23 August, 14:15
    0
    an = 10 + (-2) (n-1)

    Step-by-step explanation:

    We are given from the sequence first term, a1 = 10

    common difference, d = a2 - a1

    Where; a2 = second term = 8

    d = 8 - 10 = - 2

    From the formula, an = a1 + d (n - 1),

    We substitute the value of a1 and d

    therefore, an = 10 + (-2) (n - 1)
  2. 23 August, 14:20
    0
    Answer: an = 10 + (-2) (n - 1)

    Step-by-step explanation:

    In an arithmetic progression, the consecutive terms differ by a common difference. The formula for determining the nth term of an arithmetic sequence is expressed as

    an = a + (n - 1) d

    Where

    a represents the first term of the sequence.

    d represents the common difference.

    n represents the number of terms in the sequence.

    Looking at the given sequence,

    a = 10

    d = 8 - 10 = 6 - 8 = - 2

    Therefore, the formula for the sequence is

    an = 10 + (n - 1) - 2

    an = 10 + (-2) (n - 1)
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