名校
1 . 在等差数列
中,
,且
,则
等于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afbfd6b761451716ba3d7130c93497ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f97bb2886fd50589407ef28915598f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
A.-3 | B.-2 | C.0 | D.1 |
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2017-05-05更新
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1857次组卷
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9卷引用:重庆市西南大学附属中学2019-2020学年高一下学期期末数学试题