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1 . 在
行
列矩阵
中,记位于第
行第
列数为
当
为奇数时,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf0fed98c3361d245ee2fb9d74e2a86.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f07b0294e54b6a46fd8e204fe5cf94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/243fb9416fb3b769940f19f81b8182c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b61c7edb24e0dfbbc26b1002c77ad0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d41c9b29cd61949181ba4c9f01801b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bfd5cd79ddc6ffcc9c9e979160b571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28c62fe648ff87f6f6e4e98d94f528c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4395aba4725ca364703d2b02c03cff70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7600d2cfbdc6146db96cc545706004f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba132403b21a9a9a72dc67f72ae19db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf0fed98c3361d245ee2fb9d74e2a86.png)
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2 . 数列
满足
,
,
,则数列前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c88abd936125401c8d7e3bc21f4396.png)
______ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8323901a49cac29afd7d62864f088077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3ce9e3a7daa1c49f0aa29a58cbf506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e36bff57bcfa86432b340e25e51d42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32c88abd936125401c8d7e3bc21f4396.png)
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2020-01-09更新
|
840次组卷
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4卷引用:上海市曹杨二中2017-2018学年高二上学期10月月考数学试题
上海市曹杨二中2017-2018学年高二上学期10月月考数学试题江苏省常州市八校2021-2022学年高二下学期5月联考数学试题上海市吴淞中学2023届高三上学期开学考数学试题(已下线)第04讲 数列求和 (高频考点—精练)
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3 . 已知等差数列
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc625e19e7ca2b9d097f67a3d472e47.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f926f0c6bd101ec9a8245452fef3241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc625e19e7ca2b9d097f67a3d472e47.png)
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4 . 数列
为公差为d 的等差数列,它的前n 项和为
,已知
,
,则 d = __________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d94b094fecdf23fee7197cafda4cb8c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fc2a57059cdef29daf3d271101e801.png)
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解题方法
5 . 定义
为
的最小值,若
,对于任意的
,均有![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1299f509e55e46263a4aaaa37d46057.png)
成立,则实数
的取值范围是________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da7f26cf36177a1f1a2531b44c54c34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2497c2422dcd37bfccacf9e333b73baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1299f509e55e46263a4aaaa37d46057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71823d1bf0aa59dbad9ccd43195ffc3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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6 . 等差数列
中,
,则该数列的前
项的和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554e6c461ccc5aa3093c524aa528a4e2.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f25c8691941762abc67730ac225aa4f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5453184e251cfe787b5965cd38426962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554e6c461ccc5aa3093c524aa528a4e2.png)
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2018-01-03更新
|
573次组卷
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6卷引用:上海市曹杨第二中学2020-2021学年高二上学期开学考试数学试题
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7 . 记等差数列{an}的前n项和为Sn,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b943fc1f0c7b85edc5cddee33483360f.png)
,且A、B、C三点共线(该直线不过原点O),则S200=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b943fc1f0c7b85edc5cddee33483360f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/743e74e9c52d1e732a260c685f11c309.png)
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2016-12-04更新
|
922次组卷
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8卷引用:上海市曹杨二中2016-2017学年高二上学期开学摸底考试数学试题
上海市曹杨二中2016-2017学年高二上学期开学摸底考试数学试题2015-2016学年湖北省黄冈中学高二上第一次周测数学试卷上海市上海理工大附中2015-2016学年高二上学期第二次月考数学试题上海市七宝中学2020-2021学年高二上学期10月月考数学试题(已下线)专题四 等差数列的前n项和-2020-2021学年高中数学专题题型精讲精练(2019人教B版选择性必修第三册)(已下线)5.2.2 等差数列的前n项和(课后作业)-2020-2021学年高中数学同步备课学案(2019人教B版选择性必修第三册)陕西省铜川市耀州中学2021-2022学年高二上学期第一次月考数学试题(已下线)第13讲 向量的应用(讲义)-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)
8 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814241230971ecfd522b5ae20f314f88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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2016-12-03更新
|
558次组卷
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4卷引用:上海市长征中学2017-2018学年高二上学期期中数学试题
13-14高三上·福建莆田·阶段练习
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解题方法
9 . 若一个等差数列前3项的和为34,最后3项的和为146,且所有项的和为390,则这个数列有__ 项.
您最近一年使用:0次
2016-12-02更新
|
1862次组卷
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7卷引用:上海市曹杨二中2017-2018学年高二上学期10月月考数学试题
上海市曹杨二中2017-2018学年高二上学期10月月考数学试题(已下线)2014-2015学年山东省潍坊三县市高二上学期联考数学试卷江苏省盐城市伍佑中学2020-2021学年高二上学期期初调研考试数学试题(已下线)专题四 等差数列的前n项和-2020-2021学年高中数学专题题型精讲精练(2019人教B版选择性必修第三册)(已下线)2014届福建莆田一中高三上学期第一学段考试文科数学试卷人教A版 全能练习 第1课时 等差数列的前n项和沪教版(2020) 一轮复习 堂堂清 第四单元 4.2 等差数列