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1 January, 09:52

The first term of an arithmetic sequence is - 5, and the tenth term is 13. Find the common difference.

2

1.8

8/9

+3
Answers (2)
  1. 1 January, 10:17
    0
    d = 2.

    Step-by-step explanation:

    First term = - 5

    10th term = - 5 + 9d where d is the common difference, so

    -5 + 9d = 13

    9d = 18

    d = 2.
  2. 1 January, 10:20
    0
    2

    Step-by-step explanation:

    If the common difference is d we can write:

    -5 + 9d = 13

    9d = 18

    d = 2
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