已知等差数列
满足
,
,则
的公差为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca514a1098673fa60884d89634099537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57a6911654461b21d20b844397aa195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.2 | B.3 | C.4 | D.5 |
更新时间:2023-03-14 12:08:48
|
【知识点】 利用等差数列的性质计算
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|
容易
(0.94)
解题方法
【推荐2】已知
为等差数列
的前
项和,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](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/814be4b5e0d018e3dab75f1e76232b23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9ad4e59d7081cf19021423a984bc29.png)
A.76 | B.72 | C.36 | D.32 |
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