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12 August, 10:23

For the sequence that has two arithmetic means between - 1 and 59.

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  1. 12 August, 11:05
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    A. S. is a, a + d, a + 2d, a + 3d

    a = - 1 and a + 3d = 59

    so - 1 + 3d = 59

    3d = 60

    d = 20

    So the 2 arithmetic means are - 1 + 20 and - 1 + 40

    = 19 and 39 answer
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