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3 April, 06:36

Jeremy can determine the total number of miles walked at a constant speed by using the formula an=an-1+3 if a1=2, what are the first three terms of the sequence?

A. 2,5,8

B. 2,6,18

C. 2,-1,-4

D. 2,4,6

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Answers (1)
  1. 3 April, 09:10
    0
    If the recursive formula is a (n) = a (n-1) + 3 and a1=2 then the explicit formula is:

    a (n) = 2+3 (n-1) which simplifies to

    a (n) = 2+3n-3

    a (n) = 3n-1 so the first three terms are a (1), a (2), and a (3) which are:

    2, 5, and 8
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