A. 5/16 B. 8/16 C. 6/32 D. 16/32

作者: tihaiku 人气: - 评论: 0
问题
选项 A. 5/16 B. 8/16 C. 6/32 D. 16/32
答案 A
解析 原数列中有“1”,可能为反约分,观察分子分母变化趋势确定反约分倍数 原数列反约分: 1/1,2/2,3/4,4/8,( 5/16) 分子数列:1,2,3,4,(5)等差数列 分母数列:1,2,4,8,(16)等比数列 技巧 观察趋势确定反约分,分组:分子、分母各成一列,各有规律。

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