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17 February, 12:40

What are the first five terms of an arithmetic sequence if a 17 = - 40 and a 28 = - 73? A. 8, 11, 14, 17, 20 B. 8, 5, 2, - 1, - 4 C. - 8, - 11, - 14, - 17, - 20 D. - 8, - 5, - 2, 1, 4

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  1. 17 February, 15:09
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    The common difference

    (-73 - - 40) / (28 - 17) = - 3

    Term a1: - 40 - (-3 * (17-1)) = 8

    Term a2: 8+-3=5

    Term a3: 2

    Term a4: - 1

    Term a5: - 4
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