1,2,7,20,61,( )A. 182 B. 196 C. 263 D. 364

作者: tihaiku 人气: - 评论: 0
问题 1,2,7,20,61,( )
选项 A. 182 B. 196 C. 263 D. 364
答案 A
解析 多级数列,相邻两个数的和分别为3,9,27,81,分别为3的1次方,3的平方,3的立方,3的4次方,故下一个数为243,243-61=182。故本题选择A。

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