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5 December, 17:17

What is the 31st term in the sequence below?

-108,-90,-72,-54

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Answers (1)
  1. 5 December, 20:22
    0
    Add 18 each time

    first term is - 108

    an=a1+d (n-1)

    d=common difference

    a1=startng term

    an=-108+18 (n-1)

    31 term

    a31=-108+18 (31-1)

    a31=-108+18 (30)

    a31=-108+540

    a31=432

    31st term is 432
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