名校
1 . 等差数列
、
前
项和分别为
与
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d16918b09baf4f8f12a7fc9ae887ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13bb1191f8b0d6d6956898fe67e49725.png)
A.![]() | B.![]() | C.1 | D.![]() |
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2021-06-17更新
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5卷引用:甘肃省白银市会宁县第一中学2020-2021学年高二下学期期末数学(理科)试题
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