名校
1 . 设等比数列
的前
项和为
,若
,则
( )
![](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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c031ebcac77bce4b612e0788eeb2ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ba0cf3e6ed00193665c70f6075af55.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2022-02-10更新
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14卷引用:安徽省合肥市六校联考(十一中等)2021-2022学年高二上学期期末联考数学试题
安徽省合肥市六校联考(十一中等)2021-2022学年高二上学期期末联考数学试题安徽省亳州市蒙城一中2017-2018学年高三第五次月考数学(理)试题(已下线)专题8 数列(已下线)4.3.2 等比数列的前n项和公式(精讲)-【题型分类归纳】2022-2023学年高二数学同步讲与练(人教A版2019选择性必修第二册)第一章 数列(B卷·提升能力)宁夏银川市第九中学2017-2018学年高二上学期第一次月考数学试题【全国百强校】辽宁省鞍山市第一中学2018-2019学年高二上学期期中考试数学(理)试题【全国百强校】辽宁省鞍山市第一中学2018-2019学年高二上学期期中考试数学(文)试题2020届陕西省铜川市高三第二次模拟数学(文)试题(已下线)第03讲 等比数列及其前n项和 (练)-2023年高考数学一轮复习讲练测(新教材新高考)(已下线)8.2 等比数列(已下线)专题25 等比数列及其前n项和-2(已下线)4.3.2 等比数列的前n项和公式(1)(已下线)1.3.2 等比数列的前n项和5种常见考法归类(1)
名校
解题方法
2 . 在△
中,角
的对边分别为
,
.
(1)求角
的大小;
(2)若
,
的面积为
,求△
的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df243b39fba2e410f58a788618e0f46f.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c65edad25ddd666cdce0d7e5afefc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/787ac5e13622afab5e9f8603afe42356.png)
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2022-02-09更新
|
646次组卷
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3卷引用:安徽省安庆市怀宁县第二中学2022届高三上学期期末数学(文)试题
名校
解题方法
3 . 不等式组
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1750e3183b2525c2dedde96c07f9b6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1be282ddebf0666820c8d0ec00a21a3.png)
A.10 | B.0 | C.-10 | D.-22 |
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2022-02-09更新
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2卷引用:安徽省安庆市怀宁县第二中学2022届高三上学期期末数学(文)试题
名校
解题方法
4 . 已知数列
的前n项和为
,且
,
(1)求
的通项公式;
(2)若
,求数列
的前n项和
.
![](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/dab4d0e4fc94f3950707defa30342d68.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c24fb5d919bc05eb9df5423f3a3d65a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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2022-02-08更新
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2卷引用:安徽省安庆市怀宁县第二中学2022届高三上学期期末数学(理)试题
名校
解题方法
5 . 已知锐角
的面积为9,
,点D在边
上,且
,则
的长为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f01e031fbe9767d22952d6396c456b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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6卷引用:安徽省安庆市怀宁县第二中学2022届高三上学期期末数学(理)试题
名校
6 . 传说古希腊毕达哥拉斯学派的数学家用沙粒和小石子研究数,他们根据沙粒和石子所排列的形状把数分成许多类,若:三角形数
、
、
、
、
,正方形数
、
、
、
、
等等.如图所示为正五边形数,将五边形数按从小到大的顺序排列成数列,则此数列的第4项为( )
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900512311361536/2909369332039680/STEM/43cf6344-42c2-4983-8f9c-947521a36ba8.png?resizew=229)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900512311361536/2909369332039680/STEM/43cf6344-42c2-4983-8f9c-947521a36ba8.png?resizew=229)
A.![]() | B.![]() | C.![]() | D.![]() |
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3卷引用:安徽省合肥市第一中学2021-2022学年高二上学期期末数学试题
安徽省合肥市第一中学2021-2022学年高二上学期期末数学试题安徽省滁州市定远县民族中学2021-2022学年高二下学期期中考试数学(理)试题(已下线)第01讲 数列的概念(核心考点讲与练)-2021-2022学年高二数学考试满分全攻略(人教A版2019选修第二册+第三册)
解题方法
7 . 已知数列
的前
项和为
,2,
,
成等差数列.
(1)求数列
的通项公式;
(2)设
,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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf263f6ca69643a5211a5cccb587490.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/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
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解题方法
8 . 锐角
的内角
,
,
的对边分别为
,
,
.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
__________ ,
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/182941e84d5da8e3c12881a0845d3f65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a329122522a086094a1c1da4307ee234.png)
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2卷引用:安徽省合肥市2021-2022学年高三上学期第一次教学质量检测文科数学试题
9 . 将函数
的图象向左平移
个单位得到函数
的图象.
(1)求
的解析式,写出其单调递增区间;
(2)
的内角A,B,C的对边分别为a,b,c.若
,
,
,求c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d0126855a9431b236bfa562c9ad6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91540b81180a065a71087dcf211c77c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa8d75a6638e08eedbff8662267da6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
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10 . 若
满足约束条件
则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7b74f3266193b23959751f30373d194.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af1ddeed7b35acd5bd47b69ff5a57f38.png)
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2卷引用:安徽省合肥市2021-2022学年高三上学期第一次教学质量检测理科数学试题