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5 April, 01:42

Find the 15th term of the arithmetic sequence if a1 = - 3 and d = 2

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Answers (1)
  1. 5 April, 01:46
    0
    25

    Step-by-step explanation:

    a1 = - 3 Given

    d = 2 Given

    n = 15 Given

    Formula

    tn = a1 + (n - 1) * d

    Substitute and solve

    t15 = - 3 + (15 - 1) * 2 Calculate what's in the brackets.

    t15 = - 3 + 14*2 Combne

    t15 = - 3 + 28 Add the two terms

    t15 = 25
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