1 . 如图,画一个正三角形,不画第三边;接着画正方形,对这个正方形,不画第四边:接着画正五边形,对这个正五边形不画第五边:接着画正六边形,…,这样无限画下去,形成一条无穷伸展的等边折线,称为比尔折线.设第n条线段与第n+1条线段所夹的角为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ffa8be5a02790c6161c56b8e90db64.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c5c961aa0a7371c168728ce70936e1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92ffa8be5a02790c6161c56b8e90db64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b56ed27240d5bdb7f3a32c2fcd669d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c5c961aa0a7371c168728ce70936e1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/17/2ae0c2d2-ceee-46d1-a93d-78e142e23198.png?resizew=128)
您最近一年使用:0次
2023-03-16更新
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320次组卷
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2卷引用:上海市行知中学2022-2023学年高二上学期期末数学试题
名校
2 . 设等差数列
的前
项和为
,等比数列
的前
项和为
,若
,
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac52aa4c7b4129ed5e3899e0068ad216.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494a1444abd3f9441b30d999f65b3203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f71d45130185df66b02bac8114e2e40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3932992bfcd6cbd204918067451774e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac52aa4c7b4129ed5e3899e0068ad216.png)
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2023-03-02更新
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464次组卷
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2卷引用:上海市吴淞中学2021-2022学年高二上学期期末数学试题
名校
解题方法
3 . 若
是等差数列,首项
,则使前
项和
成立的最小自然数
是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0970281eb84516032ff7a3956cbff5dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/937228faf3b035ce9fb607ec96f707f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2023-02-08更新
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369次组卷
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2卷引用:上海市吴淞中学2022-2023学年高二上学期期末数学试题
名校
解题方法
4 . 已知函数
,数列
是公差为4的等差数列,若
,则数列
的前n项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd8180c50c98d34c27751afb6905a41d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99381f1c98c1d68d2768b805f181e54b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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2023-01-29更新
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748次组卷
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5卷引用:上海市宝山区2023届高三上学期期末模拟数学试题
上海市宝山区2023届高三上学期期末模拟数学试题重庆市第八中学校2023届高三上学期高考适应性月考(二)数学试题(已下线)数学(上海B卷)(已下线)专题09 盘点判断函数奇偶性的四种方法-1重庆市九龙坡区杨家坪中学2024届高三上学期第五次月考数学试题
名校
解题方法
5 . 设等差数列
的前
项和为
,若
,
,则满足
的最小正整数
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b29d9edc6c5b286a8d72a66f840c146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5d557d1a448f8e573b68a32b176a5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
A.1011 | B.1012 | C.2021 | D.2022 |
您最近一年使用:0次
6 . 已知数列
是共有
项的有限数列,且满足
,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f782cac518899a941e150d4cbb3e65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4604a59752240c49a9fe09963c7c828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5b2581ebf29cf79b45542d890241ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433eaf536c1fed0f48f4af7b595a2af4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
您最近一年使用:0次
名校
解题方法
7 . 如图,矩形
的一边
在
轴上,另外两个顶点
在函数
的图像上.若点
的坐标为
,记矩形
的周长为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b655bca40e45df1ceced3891330746.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36134f01da0f13b340e82e8835324f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/374cb268ffa23fc0bf12c6e6dc873c4f.png)
![](https://img.xkw.com/dksih/QBM/2022/11/9/3106056472313856/3107338637729792/STEM/3f1f55853df94f0f8cb0b90abd2a623d.png?resizew=9)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf09e20e50419a5d1ae9561527f4499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aedfe32e46614b8f5cbe6e71b4dd8fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f5c583c98a1fd516c6ceaa60b55dec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1eab1cca4e72f81d6d558488266524f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36134f01da0f13b340e82e8835324f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b655bca40e45df1ceced3891330746.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/16/8551b374-5081-4e8f-a7d2-9f18ede9df5a.png?resizew=117)
您最近一年使用:0次
2022-11-11更新
|
389次组卷
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4卷引用:上海市行知中学2023届高三上学期期中数学试题
名校
解题方法
8 . 已知数列
的前
项和
,数列
满足
,
.
(1)求数列
、
的通项公式.
(2)若
,求数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddaf0e392a29269522a8fde7fa8a87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcba622ae8d5e614f5f59982ce9b9b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ce8f630feb83122acb70e54496f786.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b57fc61aae0064542bbb65f1df944a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2022-10-16更新
|
1022次组卷
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5卷引用:上海交通大学附属中学2023届高三上学期10月月考数学试题
名校
9 . 在等差数列
中,前7项的和
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e563b8d1da5930696a0e6d17d2d1df.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a39dabf1d2cb4094bd2178576970d29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81e563b8d1da5930696a0e6d17d2d1df.png)
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2022-10-13更新
|
676次组卷
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5卷引用:上海市宝山区2023届高三上学期10月教学质量数学试题
上海市宝山区2023届高三上学期10月教学质量数学试题上海市浦东新区杨思高级中学2023届高三上学期期中数学试题(已下线)4.2.2 等差数列的前n项和公式(精练)(1)上海市进才中学2024届高三上学期10月月考数学试题(已下线)上海市徐汇中学2023-2024学年高三上学期期中考试数学试题变式题6-10
名校
解题方法
10 . 已知数列
的前
项和为
,且满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41f86b04380c961a92b5e69c5f077248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37a86b251bde93f15fc3a9df984c2c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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2022-10-10更新
|
715次组卷
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12卷引用:上海市宝山区2022届高三上学期一模数学试题
上海市宝山区2022届高三上学期一模数学试题(已下线)专题4.8 数列(能力提升卷)-2021-2022学年高二数学特色专题卷(人教A版2019选择性必修第二册)(已下线)专题1.3 数列 章末检测3(难)-【满分计划】2021-2022学年高二数学阶段性复习测试卷(人教A版2019选择性必修第二册)西藏自治区拉萨中学2022届高三第七次月考数学(理)试题西藏自治区拉萨中学2022届高三第七次月考数学(文)试题上海财经大学附属北郊高级中学2023届高三上学期开学考试数学试题(已下线)专题17 数列(练习)-1(已下线)第09讲 数列求通项、求和(已下线)4.2.2等差数列的前n项和公式(1)上海市闵行中学2024届高三上学期开学考试数学试题上海市宜川中学2024届高三上学期10月月考数学试题(已下线)1.2.2 等差数列的前n项和8种常见考法归类(3)