名校
解题方法
1 . 等差数列
的前n项和为
,若
则公差
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6d5983c6659538f39a323e8c452a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c98c59cd4749afdd21e73529fc84323.png)
A.1 | B.2 | C.-1 | D.-2 |
您最近一年使用:0次
2022-05-01更新
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890次组卷
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2卷引用:山西省太原市2022届高三二模数学(理)试题