1 . 在等差数列
中,
,公差
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae3012337aa392709349731fb1eef5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
A.6 | B.5 | C.4 | D.3 |
您最近一年使用:0次
2020-06-24更新
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626次组卷
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2卷引用:广西桂林市2020-2021学年高二上学期期末数学(文)试题
A.6 | B.5 | C.4 | D.3 |