-1,4,2l,56,115,(  )。 A.146 B.178 C.19

恬恬2019-12-17  11

问题 -1,4,2l,56,115,(  )。A.146B.178C.195D.204

选项

答案D

解析原数列整理为[img]/upload/tiku/154/2182024_1.latex[/img],[img]/upload/tiku/154/2182024_1_1.latex[/img],[img]/upload/tiku/154/2182024_1_2.latex[/img],[img]/upload/tiku/154/2182024_1_3.latex[/img],[img]/upload/tiku/154/2182024_1_4.latex[/img],依此规律空缺项为[img]/upload/tiku/154/2182024_1_5.latex[/img]。
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