名校
1 . 已知等差数列
的公差为d,前n项和为
,
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7985c03669590e53d2909a18ccb460a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f9cc0a87178dd414dfb601f2af82c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d4a2a5a334a92014cb8adaa63ae115a.png)
A.![]() | B.![]() ![]() |
C.![]() | D.当n=7时,![]() |
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解题方法
2 . 已知
是
的前n项和,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.若![]() ![]() |
B.若![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() |
您最近一年使用:0次
2022-12-10更新
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407次组卷
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2卷引用:新疆哈密市第八中学2022-2023学年高二上学期期末考试数学试题