1 . 等差数列
中,
,
,则该数列
的公差为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4322516aa4b45c3d5d256a2aab12ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ea8f24340dc4c83c7dd6f796cef5f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.2 | C.![]() | D.3 |
您最近一年使用:0次
2023-06-17更新
|
1159次组卷
|
3卷引用:新疆阿勒泰地区2023-2024学年高二上学期期末联考数学试题
名校
解题方法
2 . 已知等差数列
中,前5项和
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fcd86b9ed6819116a261629f96fae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a7bf78468ca801ef305ce4f76986da1.png)
A.16 | B.17 | C.18 | D.19 |
您最近一年使用:0次
2020-05-05更新
|
1125次组卷
|
4卷引用:新疆乌鲁木齐市第十九中学2023-2024学年高二下学期第二次月考数学试题