3,7, 47,2207,( )A.4414;B.6621;C.8828;D.4870847

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问题 3,7, 47,2207,( )

选项 A.4414;B.6621;C.8828;D.4870847

答案D

解析选D,第一项的平方 - 2=第二项
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