名校
1 . 数列
,3,
,
,
,…,则9是这个数列的第( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b12efb03327f461e868b2ea433f9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce0249a3ff99c083fa4421877549db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adbd3e8cf8325999cde03adf845d3dd0.png)
A.12项 | B.13项 | C.14项 | D.15项 |
您最近一年使用:0次
2020-03-06更新
|
489次组卷
|
4卷引用:河北省石家庄四中2023-2024学年高二上学期期中数学试题