-1,0,31,80,63,(  ),5。 A.48 B.36 C.24

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问题 -1,0,31,80,63,(  ),5。A.48B.36C.24D.12

选项

答案C

解析原数列整理为[img]/upload/tiku/154/2181770_1.latex[/img],[img]/upload/tiku/154/2181770_1_1.latex[/img],[img]/upload/tiku/154/2181770_1_2.latex[/img],[img]/upload/tiku/154/2181770_1_3.latex[/img],[img]/upload/tiku/154/2181770_1_4.latex[/img],[img]/upload/tiku/154/2181770_1_5.latex[/img],[img]/upload/tiku/154/2181770_1_6.latex[/img]。
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