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9 August, 19:38

Find the 13th term of arithmetic sequence whose common difference is d=7 and whose first term is a1=1.

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  1. 9 August, 20:50
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    You can find a specific term of an arithmetic sequence with the formula an = a1 + (n - 1) d.

    a13 = 1 + (13 - 1) (7)

    a13 = 1 + (12) (7)

    a13 = 1 + 84

    a13 = 85

    The 13th term of this arithmetic sequence is 85. I hope this answers your question.
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