5,5,14,38,87,(  )。 A.167 B.168 C.169

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问题 5,5,14,38,87,(  )。A.167B.168C.169D.170

选项

答案A

解析原数列整理为[img]/upload/tiku/154/2181893_1.latex[/img],[img]/upload/tiku/154/2181893_1_1.latex[/img],[img]/upload/tiku/154/2181893_1_2.latex[/img],[img]/upload/tiku/154/2181893_1_3.latex[/img],依此规律空缺项为[img]/upload/tiku/154/2181893_1_4.latex[/img]。
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