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2 January, 01:30

What is the sum of the arithmetic sequence 8,14,20 ..., if there are 22 terms? answers to choose from.

a) 1,558

b) 1,560

c) 1,562

d) 1,564

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Answers (1)
  1. 2 January, 03:27
    0
    The common difference in this sequence is 6

    The sum of n terms of an arithmetic sequence is given by:

    S = n/2 [2a₁ + (n - 1) d]

    S = 22/2 [2 (8) + (22 - 1) (6) ]

    S = 1562

    The answer is C
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