36,45,70,119,200,( )A.321 B.341 C.421 D.441

作者: tihaiku 人气: - 评论: 0
问题 36,45,70,119,200,( )
选项 A.321 B.341 C.421 D.441
答案 A
解析 数列无明显倍数或幂次特征,优先考虑做差。做差后得到新数列:9,25,49,81,(),分别为3^2,5^2,7^2,9^2,(),即连续奇数的平方数,则新数列的下一项=11^2=121。所求项=200+121=321。 故正确答案为A。

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