-7/2,-1,-1/8,1/8,5/32,( )A.7/64 B.7/32 C.1/8 D.5/16

作者: tihaiku 人气: - 评论: 0
问题 -7/2,-1,-1/8,1/8,5/32,( )
选项 A.7/64 B.7/32 C.1/8 D.5/16
答案 C
解析 分数数列,考虑反约分。得:-7/2,-4/4,-1/8,2/116,5/32。分子是公差为3的等差数列,分母是公比为2的等比数列。所求项应为8/64=1/8。C项当选。

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