5, 7, 25, 9, 125, 11,( )。A. 13 B. 17 C. 625 D. 225

作者: rantiku 人气: - 评论: 0
问题 5, 7, 25, 9, 125, 11,( )。 A. 13 B. 17 C. 625 D. 225
选项
答案 C
解析 隔项分组为:5,25,125 ( ),此数列是公比为5的等比数列,( )= 125X5 = 625,故正确答案为C。

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