6,22,39,60,90,( ) A.136 B.124 C.118 D.112

作者: rantiku 人气: - 评论: 0
问题 6,22,39,60,90,( ) A.136 B.124 C.118 D.112
选项
答案 A
解析 数列递增,变化增幅不大,首先考虑邻项相减,得到一级差为:16,17,21,30。再进行邻项相减得到:1,4,9。这是标准平方数列,下一个数是16,所以结果为16+30+90=136。故正确答案为A。

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