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1 . 公差不为零的等差数列
满足
,
为
前
项和,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489aa86efed78d9760da9c2047bee13f.png)
![](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)
A.![]() | B.![]() ![]() |
C.当![]() ![]() | D.当![]() ![]() |
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2020-11-14更新
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4卷引用:湖南省衡阳市第八中学2020-2021学年高二上学期10月月考数学试题