2 ,3 ,10 ,15 ,26 ,35 ,( )A.40 B.45 C.50 D.55

作者: tihaiku 人气: - 评论: 0
问题 2 ,3 ,10 ,15 ,26 ,35 ,( )
选项 A.40 B.45 C.50 D.55
答案 C
解析 解析:本题是道初看不易找到规律的题,可试着用平方与加减法规律去解答,即 2=1 2+1,3=2^2-1,10=3 2+1,15=4^2-1,26=5^2+1,35=6^2-1,依此规律,( )内之数应为 7^2+1=50。故本题的正确答案为 C。

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