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1 . 等差数列
的前三项依次为x,
,
,则x的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ac7fa45d1a150d095f7ae45aab0696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4c1e4d105299f6d317f75141188a679.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-05-05更新
|
755次组卷
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3卷引用:四川省仁寿县文宫中学2022-2023学年高二上学期9月月考数学(文)试题
四川省仁寿县文宫中学2022-2023学年高二上学期9月月考数学(文)试题河南省濮阳市油田第二高级中学2021-2022学年高二上学期9月考试文科数学试题(已下线)4.2.1 等差数列的概念 (精讲)-【题型分类归纳】2022-2023学年高二数学同步讲与练(人教A版2019选择性必修第二册)
2 . 已知等差数列
的前
项和为
,若
,则
=_______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8d2035ae05e21ae00a883863521199f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da62fb1b88d79e7e4e05a488d78dd0f7.png)
您最近一年使用:0次
2020-03-04更新
|
533次组卷
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4卷引用:四川省眉山市2019-2020学年高一下学期期末考试数学试题