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22 July, 17:12

Insert two arithmetic means between - 2 and 13.

A. 1, 10

B. 3, 8

C. 2, 9

D. 4, 7

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  1. 22 July, 17:31
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    A1 = - 2

    a4 = 13

    13 = - 2 + d (4-1)

    13 = - 2 + 3d

    d = 15/3 = 5

    a2 = - 2 + 5 = 3

    a3 = 3 + 5 = 8

    3, 8 (B)
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