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18 July, 08:02

A number pattern has 5 terms. the first term is 13. the rule of the pattern is add 9 what are the 5 terms of the pattern?

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Answers (2)
  1. 18 July, 11:46
    0
    An arithmetic sequence always has the rule:

    a (n) = a+d (n-1), a=initial term, d=common difference, n=term number

    In this case, a=13 and d=9 so

    a (n) = 13+9n-9

    a (n) = 9n+4

    so the first 5 terms are:

    13, 22, 31, 40, 49
  2. 18 July, 11:49
    0
    13, 22, 31, 40, 49, 58
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