名校
1 . 已知
,且
成等差数列,随机变量
的分布列为
下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846fed98a219097783e0ca2f41483cac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![]() | 1 | 2 | 3 |
![]() | ![]() | ![]() | ![]() |
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
您最近一年使用:0次
7日内更新
|
234次组卷
|
8卷引用:概率、随机变量及其分布-综合测试卷B卷
名校
解题方法
2 . 若函数
的四个零点成等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93571b6a290224c0716612692bb74836.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
您最近一年使用:0次
3 . 命题P:
,
,…,
的平均数与中位数相等;命题Q:
,
,…,
是等差数列,则P是Q的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab84c3fe70da38ccb246fd4a71f9d86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ab84c3fe70da38ccb246fd4a71f9d86.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
4 . 已知等比数列
的首项
,公比为
,
的
项和为
且
,
,
成等差数列.
(1)求
的通项
:
(2)若
,
,求
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3783e69ef5a6a0af566ff4e21ccf03.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/0f30f56664446f32dbbc2c5f12a99374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d27182444d3da4003680f07ec299087c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9eeeea0a80744f6fc98376b5e12ddc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bccfebfa207e3b95eb658c00f489c4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f329b217e1051b23f0d61023cdc6e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
您最近一年使用:0次
解题方法
5 . 在
中,内角A,B,C所对应的边分别为a,b,c.
(1)若
,
,求角A的值;
(2)若
,且b是a和
的等差中项,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f37bbd6940063ebe81e02f41d34c86cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebf70d9224a4c8d150acb0619e1750a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f26ae0e31513d85924fd32aca9b9a0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e563e032dfdef69b0f357060c27bd4.png)
您最近一年使用:0次
名校
解题方法
6 . 已知正项等比数列
中,
成等差数列.若数列
中存在两项
,使得
为它们的等比中项,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a69bebfcae78b52d51c1edfbbbfa712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2320fcc6aaa1d36b49f8e03b376b80e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d3b31aa38ae4c0da2b7e792081c5f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd93ee03569849295ebde055410d1b84.png)
A.3 | B.4 | C.6 | D.9 |
您最近一年使用:0次
2024-03-04更新
|
2862次组卷
|
11卷引用:云南省德宏傣族景颇族自治州2024届高三上学期期末教学质量监测数学试题
云南省德宏傣族景颇族自治州2024届高三上学期期末教学质量监测数学试题2024年普通高等学校招生全国统一考试数学模拟试题(一)(新高考九省联考题型)(已下线)考点7 基本不等式及其应用 --2024届高考数学考点总动员【讲】湖北省荆州市沙市中学2024届高三下学期3月月考数学试题(已下线)第2讲:不等式的解法与性质、基本不等式【练】云南省大理州祥云县部分高中(云·上联盟五校协作体)2024届高三下学期复习摸底诊断联合测评数学试题山西省太原市师苑中学校2023-2024学年高三下学期第二次月考数学试题(已下线)1.3.1 等比数列7种常见考法归类(3)广东省汕头市潮阳实验学校2023-2024学年高二下学期第一次月考数学试题江西省丰城市第九中学2023-2024学年高二下学期4月月考数学试题四川省成都市简阳实验学校2023-2024学年高二下学期3月月考数学试题
解题方法
7 . 已知公差为
的等差数列
,
为其前
项和,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63233dc36a7f1f2693e85e83f7b39c8.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
解题方法
8 . 数列
满足
且
,
,
,
构成等差数列.
(1)试求出所有三元实数组(α,β,γ),使得
为等比数列.
(2)若
,求
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f390f47fa5678c9a165c50fb9dec58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be536a2097ded867adac5edebb79906b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75e6820c50fa2aa589de5331d7d5f950.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13739ca823d61005798cc3298400c6b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad28237c0f9ca65341101d9d7e73e73e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee766a75ae9ee290e403b42b3569db6.png)
(1)试求出所有三元实数组(α,β,γ),使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee766a75ae9ee290e403b42b3569db6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4623bc660145c6ff98af7b1753d5357a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cee766a75ae9ee290e403b42b3569db6.png)
您最近一年使用:0次
名校
9 . 已知
的展开式中,前三项的系数依次成等差数列,则展开式中二项式系数最大的项是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250c63451843d520f22a181218371990.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-02-20更新
|
2941次组卷
|
10卷引用:甘肃省部分学校2024届高三下学期2月开学考试数学试题
甘肃省部分学校2024届高三下学期2月开学考试数学试题河南省九师联盟2024届高三上学期2月开学考试数学试卷(已下线)第1套 重组模拟卷(模块二 2月开学)内蒙古自治区赤峰市松山外国语学校2024届高三下学期开学考试数学(理)试题(已下线)热点8-1 排列组合与二项式定理(10题型+满分技巧+限时检测)(已下线)6.3 二项式定理(分层练习)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第三册)(已下线)专题2.4二项式定理(八个重难点突破)-2023-2024学年高二数学下学期重难点突破及混淆易错规避(人教A版2019)(已下线)7.4 二项式定理 (3)(已下线)6.3二项式定理 第三练 能力提升拔高湖北省部分高中联考协作体2023-2024学年高二下学期期中考试数学试卷
10 . 已知递增的等比数列
满足
,且
成等差数列.
(1)求
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/6df1038200f2d97a52c716aab6c3bcb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf1ae1ee45eb32d0bbbd152bce34899.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f4f5048a869f1de128f32359aff792f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
您最近一年使用:0次