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数字推理-12,2,8,7,3,()
人气:322 ℃ 时间:2020-03-22 13:58:18
解答
[(-12) + 8 * 2] / 2 = 2
[2 + 7 * 2] / 2 = 8
[8 + 3 * 2] / 2 = 7
==> [a1 + a3 * 2] / 2 = a2
所以 [7 + * 2] / 2 = 3 求得 = -0.5
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