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4 January, 12:34

Write an

explicit formula for An, the nth term of the sequence

15, 7, - 1, ...

+5
Answers (1)
  1. 4 January, 12:59
    0
    aₙ=23 - 8n

    Step-by-step explanation:

    15, 7, - 1, ...

    AP with the first term of 15 and common difference - 8

    aₙ=a₁ + (n-1) d = 15 + (n-1) * (-8) = 15 - 8n + 8 = 23 - 8n

    aₙ=23 - 8n
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