名校
解题方法
1 . 已知数列
是等差数列,
都是正整数,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
A.若![]() ![]() | B.![]() |
C.![]() | D.若![]() ![]() |
您最近一年使用:0次
2024-01-25更新
|
285次组卷
|
2卷引用:湖南省株洲市第一中学2021届高三第三次模拟检测数学试题
名校
解题方法
2 . 已知等比数列
的公比
,且
,
,
是公差为
的等差数列
的前3项.
(1)求
的最小值;
(2)在
取最小值的条件下,设
,数列
的前
项和为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda6dc559d07bc22c9a0ed1e3a6d01d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc17ca3ab612ea9cf6cfa1eea53cb1eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450bfba8c76f5957e945026cbd235298.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450bfba8c76f5957e945026cbd235298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f672010fe85e005afba869d1c50e27.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e8aef2efae0e76650c8463d80f69a14.png)
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2024-01-13更新
|
311次组卷
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2卷引用:湖南省长沙市宁乡市第一高级中学2021届高三第三次模拟考试数学试卷
3 . 在①
,②
,③
这三个条件中任选一个,补充在下面横线处,并加以解答.
已知
的内角
所对的边分别是
,若 ,且
成等差数列,判断
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76e0d4945f6b06a3f0791ab7ee3d276d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4542e5dfa3702fb2824682f0731a1c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f1d5b50db0b87df7a8907a4e0699b6.png)
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
名校
解题方法
4 . 在
中,内角
所对的边分别为
,若
且
.
(1)求角
的大小;
(2)在①
成等差数列,②
成等差数列,③
成等差数列,这三个条件中任选一个作为已知条件,求
的面积
.(如果选择多个条件分别解答,则按第一个解答计分)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/2fc00602d79049924e872ca0d9e08c9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)在①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd728e84f78f674b575b18ad478bb58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d6e7e03305ce819a63b754cab365c6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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名校
解题方法
5 . 已知正项等比数列
的前
项和为
,若
成等差数列,
.
(1)求
与
;
(2)设
,数列
的前
项和记为
,求
.
![](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/5bff10824ab9a9e1351b07569820399e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9824bccea52966ead370db7729f61c3b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90ee20557326d7d408a75ab26c70b37.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次
2023-04-26更新
|
1136次组卷
|
17卷引用:山西省吕梁市2021届高三三模数学(理)试题
山西省吕梁市2021届高三三模数学(理)试题陕西省2021届高三下学期教学质量检测测评(五)理科数学试题重庆市第八中学2021届高三下学期第五次模拟数学试题(已下线)“超级全能生”2021届高三全国卷地区5月联考试题(乙卷)数学(理)试题(已下线)“超级全能生”2021届高三全国卷地区5月联考试题(甲卷)数学(理)试题四川省成都外国语学校2020-2021学年高一下学期6月月考数学(理)试题四川省泸州市泸县第一中学2021-2022学年高一下学期期中考试数学试题四川省泸州市泸县第四中学2022-2023学年高三下学期第二次诊断性模拟考试数学(理)试题四川省泸州市泸县第四中学2023届高三下学期二诊模拟考试数学(文)试题青海省西宁市六校联考2022-2023学年高三下学期开学考试数学(理)试题四川省泸县第四中学2023届高三第二次诊断性模拟考试数学(理科)试题四川省凉山州宁南中学2022-2023学年高二下学期第二次月考理科数学试题陕西省西安市雁塔区第二中学2022-2023学年高二下学期第二次阶段性测评理科数学试题陕西省西安市雁塔区第二中学2022-2023学年高二下学期第二次阶段性测评文科数学试题陕西师范大学附属中学渭北中学2022-2023学年高二下学期5月月考理科数学试题西藏昌都市第一高级中学2023届高三高考全真仿真考试数学(理)试题新疆生产建设兵团第六师芳草湖农场中学2021-2022学年高二上学期期末数学(理)试题
名校
解题方法
6 . 在
中,已知
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/163da1f861bfbdafa09f51b43a9c6346.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3745da8d5cc3897c2e2758666beee54.png)
A.![]() | B.![]() |
C.若![]() ![]() | D.![]() |
您最近一年使用:0次
解题方法
7 . 已知a,b,c是等差数列,点P到直线
的垂足为M,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29fa0e0526598c4140789f6328daac9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d024ff2bae05fa15d5e55930c9886723.png)
A.直线l过定点 |
B.点P到直线l的最大距离为![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
名校
8 . 为了调研雄安新区的空气质量状况,某课题组对雄县、容城、安新3县空气质量进行调查,按地域特点在三县内设置空气质量观测点,已知三县内观测点的个数分别为6,y,z依次构成等差数列,且6,y,
成等比数列,若用分层抽样的方法抽取12个观测点的数据,则容城应抽取的数据个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b79e2486f480ed7e153809489a524f6.png)
A.2 | B.4 | C.6 | D.8 |
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名校
9 . 设等比数列
的前n项和为Sn,若
,
,
成等差数列,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05201ef79a5d5904f492845396fb5470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48e81b54f78b96294295542b010dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e91dcd541e3ba2ea6311906c3d5cf39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d211c5a622d0be3b39931d814f9a683.png)
A.-1 | B.-3 | C.-5 | D.-7 |
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2023-02-09更新
|
819次组卷
|
5卷引用:云南省曲靖市第一中学2021届高三高考复习质量监测卷(八)数学(理)试题
云南省曲靖市第一中学2021届高三高考复习质量监测卷(八)数学(理)试题河北省深州市长江中学2022届高三上学期期中数学试题(已下线)专题07 数列的通项与数列的求和(练)--第一篇 热点、难点突破篇-《2022年高考数学二轮复习讲练测(新高考·全国卷)》青海省西宁市海湖中学2022-2023学年高三上学期期末考试数学(理)试题(已下线)专题16 等比数列-1
10 . 设数列
的前
项和为
,若
与
的等差中项为常数2,则数列
的各项和是________
![](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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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