已知数列
、
都是等差数列,
,
,用
、
分别表示数列
、
的前k项和(k是正整数),若
,则
的值为__________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1634eb05d97aca8db8dc6d8fa77e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65341ff87dca4d68c49c70f87b41638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c29db0779430b77e6ed911e0ff26c91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4bf9e10cc05ecf3e5178a8fdcbc457.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29518f13a1ebc3fff8181c2d7cfba22f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2448cf72af76b810310e4cfb9818e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f6a3b85b89fc516bd467f45b51531a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3148438507f4c6d0d8f92552dae2e437.png)
11-12高二·山东潍坊·假期作业 查看更多[4]
(已下线)2012届山东省潍坊市高二寒假作业(四)数学试卷高中数学必修5综合测试题(已下线)第02章+章末复习课(基础练)-2020-2021学年高二数学十分钟同步课堂专练(人教A版必修5)(已下线)第04章+章末复习课(基础练)-2020-2021学年高二数学十分钟同步课堂专练(人教A版选择性必修第二册)
更新时间:2018-12-20 18:26:13
|
【知识点】 等差数列的前n项和
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【推荐2】已知公差不为零的等差数列
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____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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