名校
1 . 某大型公司进行了新员工的招聘,共有10000人参与.招聘规则为:前两关中的每一关最多可参与两次测试,只要有一次通过,就自动进入下一关的测试,否则过关失败.若连续通过三关且第三关一次性通过,则成功竞聘,已知各关通过与否相互独立.
(1)若小李在第一关、第二关及第三关通过测试的概率分别为
,求小李成功竞聘的概率
;
(2)统计得10000名竞聘者的得分
,试估计得分在442分以上的竞聘者有多少人.(四舍五人取整)
附:若随机变量
,则
(1)若小李在第一关、第二关及第三关通过测试的概率分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7972c628ff66ac23ec395f5a388e14f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)统计得10000名竞聘者的得分
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146297289fa8cb88d94336994d0d7a2.png)
附:若随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53c1ed67167078ea4f5f1ee53ee14164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2a2e921bd45eb5aaeefe49703c87573.png)
您最近一年使用:0次
7日内更新
|
978次组卷
|
2卷引用:湖南省长沙市明德中学2023-2024学年高二下学期5月阶段性考试数学试题
名校
解题方法
2 . 如图所示,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f287a213e656c175807a50b9e06b9e1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc1f481e946fb1908a32df820486eee9.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
7日内更新
|
472次组卷
|
4卷引用:湖南省娄底市第三中学2023-2024学年高二下学期5月月考数学试题
名校
3 . 如图,该多面体的表面由18个全等的正方形和8个全等的正三角形构成,该多面体的所有顶点都在同一个正方体的表面上.若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056c2272e0d10d6dd9706e6324d8e62d.png)
A.![]() | B.该多面体外接球的表面积为![]() |
C.直线MG与直线PQ的夹角为![]() | D.二面角![]() ![]() |
您最近一年使用:0次
7日内更新
|
160次组卷
|
4卷引用:湖南省娄底市第三中学2023-2024学年高二下学期5月月考数学试题
4 . 已知等轴双曲线
的左、右焦点分别为
,半焦距为
,过点
的直线
与
的两条渐近线从左到右 依次交于
两点,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d73300ebfae822362f43eb496bb37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5754287fb16adbb205872e5b18a6ef1e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2024-06-05更新
|
65次组卷
|
2卷引用:湖南省娄底市第三中学2023-2024学年高二下学期5月月考数学试题
5 . 已知数列
的前
项和为
,
,
,对于任意的
,
,不等式
恒成立,则实数
的取值范围为__________ .
![](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/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef3f4fd9d7ea6f1512948f1d68756eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a111628c5ea54305dba24105b84900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36edf9da85238914aea6c46b0f4575b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2024-05-08更新
|
434次组卷
|
2卷引用:湖南省部分学校2023-2024学年高二下学期联考数学试卷
6 . 已知
是等差数列,
,
,数列
的前
项和为
,且
.
(1)求
、
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/d5ef35b21da4cd8130642539d8245f83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2955370028ae5a872079c12bfedc3b4e.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/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49e3a9bb248d5c1580b04a35bf884100.png)
(1)求
![](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/4dfc13be151ccab7e068d9a54701bd61.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)
您最近一年使用:0次
2024-05-04更新
|
1311次组卷
|
5卷引用:湖南省部分学校2023-2024学年高二下学期联考数学试卷
湖南省部分学校2023-2024学年高二下学期联考数学试卷(已下线)模块五 专题2 全真基础模拟2(人教B版高二期中)(已下线)模块一专题1《数列基础、等差数列和等比数列》单元检测篇B提升卷(高二下人教B版)四川省南充市嘉陵第一中学2023-2024学年高二下学期4月期中考试数学试题(已下线)模块一 专题2《数列基础、等差数列和等比数列》单元检测篇B提升卷(高二北师大版)
7 . 如图1所示,梯形
中,
,
,
为
的中点,连结
交于
,将
沿
折叠,使得
(如图2).
;
(2)求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625bca170fed3fbdc1441b3c0df4a6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f5771d548254e2629d81574e2da331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/876bb8ce0ca53475fa091ffd18bdc94a.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
8 . 已知椭圆
,
、
分别为椭圆
的左、右焦点,
为椭圆
上的任一点,
的周长是
,当
轴时,
.
的方程;
(2)设直线
与椭圆
交于另一点
.已知
被圆
截得的弦长为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa9a6be97b5f275d55697fd3cd0a442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba894750aa9abe7b1eb69822bfc63dcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0739793f234f8e86adc6177801ae7295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b96eda0601673fafb836643969914f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99797d2ad06e662bf2d245b8e3f5ef70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1f0417d8269f01d8e0bc1a8756e2ac.png)
您最近一年使用:0次
9 . 已知直线
,圆
的方程为
,则下列表述正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6695cd6b20e4e438856e42802beb10d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19da0e222aa85416535ece3ca66911b9.png)
A.当实数![]() ![]() ![]() |
B.当直线![]() ![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |
您最近一年使用:0次
名校
10 . 有序实数组
称为
维向量,
为该向量的范数,范数在度量向量的长度和大小方面有着重要的作用.已知
维向量
,其中
.记范数为奇数的
的个数为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9bc06a8ca80e9f47ccda39308e7ba4.png)
______ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c351c3dcae1b29183e5e78496378396b.png)
______ .(用含
的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2624bf8eae8ec856a5f0ba799cee719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70fd5ea91c137241e07d2d53568557a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0681ee547b06d12a5f689b6c16c85181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5ac304996e908248a1f0d3eae50d0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3cfeacc29e6a61c5b3b4e439c0a91df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9bc06a8ca80e9f47ccda39308e7ba4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c351c3dcae1b29183e5e78496378396b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
您最近一年使用:0次
2024-04-17更新
|
1806次组卷
|
10卷引用:湖南省长沙市南雅中学2023-2024学年高二下学期第二次月考(5月)数学试题
湖南省长沙市南雅中学2023-2024学年高二下学期第二次月考(5月)数学试题河北省衡水市武邑中学2023-2024学年高二下学期第二次月考数学试题四川省成都市石室阳安学校2023-2024学年高三下学期4月月考数学(理)试题东北三省四市教研联合体2024届高考模拟(一)数学试卷东北三省四城市联考暨沈阳市2024届高三下学期数学质量检测(二)吉林省长春市2024届高三下学期三模数学试题湖北省沙市中学2024届高三下学期模拟预测数学试题(已下线)江苏省苏锡常镇四市2024届高三下学期教学情况调研考试数学试题重庆市七校联盟2024届高三下学期三诊考试数学试题(已下线)【练】专题二 二项式定理应用问题(压轴大全)