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29 November, 02:34

Identify the 33rd term of the arithmetic sequence 9, 7 1/2, 6.

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Answers (2)
  1. 29 November, 02:38
    0
    The answer is: B: - 39
  2. 29 November, 02:49
    0
    The formula of arithmetic sequence is expressed in the following manner:

    an = a1 + d * (n-1) where d is the difference and n is an integer.

    substituting,

    7 = 9 + d * (2-1)

    d = - 1.5

    hence,

    a33 = 9 - 1.5 * (33-1)

    a33 = - 39
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