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30 October, 08:31

Given {27,15,3,-9, ... } find a11

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Answers (2)
  1. 30 October, 08:38
    0
    -91

    Step-by-step explanation:

    a1=27

    d=15-27=-12

    an=27 + (n-1) (-12) = 27-12n+12=39-12 n

    a11=39-12 (11) = 39-132=-91
  2. 30 October, 08:40
    0
    Answer: - 21, - 33, - 45

    Step-by-step explanation:

    each next number is being subtracted by 12 so
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