1,2,4, 7,16,14,64,( )。 A. 68 B. 74 C. 98 D. 128

作者: tihaiku 人气: - 评论: 0
问题 1,2,4, 7,16,14,64,( )。 A. 68 B. 74 C. 98 D. 128
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答案 C
解析 交叉数列。奇数项为1 = 12,4 = 22,16 = 42,64 = 82,由等比数列的平方项构成。偶数项为2,7,14,满足14 = 2X7,故原数列的下一项为7X14 = 98。故正确答案为C。

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