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13 July, 06:52

The first and last terms of a 52-term arithmetic series are listed in the table. What is the sum of the series?

Term Number Term

1 1

52 154

+3
Answers (2)
  1. 13 July, 06:54
    0
    Sn = (n (a1 + a52)) / 2

    n = 52

    a1 = 1

    a52 = 154

    s52 = (52 (1 + 154)) / 2

    s52 = (52 (155)) / 2

    s52 = 8060/2

    s52 = 4030 <==
  2. 13 July, 07:04
    0
    The answer is: D: 4030
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