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9 February, 18:53

Find the 81st term of the arithmetic sequence - 10, - 25, - 40

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Answers (2)
  1. 9 February, 20:45
    0
    5 - (N x 15)

    81 x 15 = 1215

    5-1215=-1210

    -1210 should be the 81st term
  2. 9 February, 22:16
    0
    -1210

    Step-by-step explanation:

    The nth term is - 10 - (15 (n-1)) so

    -10 - (15 (80) =

    -10-1200=

    -1210
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