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12 September, 15:13

What is the common difference for this arithmetic sequence?

45, 39, 33, 27, 21, ...

A. 45

B. - 6

C. 6

D. 39

+2
Answers (2)
  1. 12 September, 15:20
    0
    B. - 6

    The numbers in the equation are decreasing meaning that the common difference must be a negative number.
  2. 12 September, 17:38
    0
    Subtract a number from the next number.

    39 - 45 = - 6

    Answer: B. - 6
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