0 ,12 ,24 ,14 ,120 ,16 ,( )A.280 B.32 C.64 D.336

作者: tihaiku 人气: - 评论: 0
问题 0 ,12 ,24 ,14 ,120 ,16 ,( )
选项 A.280 B.32 C.64 D.336
答案 D
解析 第二项、第四项……第n+1项成等差数列,公差是2. 第一项、第三项、第五项……第n+2项按照的规律是“(n+2)的立方-(n+2)” 0就是1的立方减去1,24就是3的立方减去3,120就是5的立方减去5,以此类推第七项的值应该是7的立方减去7,即343-7=336

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