1 . 在四面体
中,
与
互相垂直,
,且
,则四面体体积的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5ba108d7d2d4807f2c74a22e536fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280aaf7973d8ef68845fa8a24101082c.png)
A.4 | B.6 | C.8 | D.4.5 |
您最近一年使用:0次
解题方法
2 . 正三棱柱
的底面边长为1,侧棱长为2,一只蚂蚁从
点出发,每次沿着该三棱柱的一条棱的端点爬行到另一个端点,若它选择三个方向爬行的概率相等,且每次爬行都相互独立.
(1)记这只蚂蚁经过4次爬行后,其爬行的总路程为
,求
的分布列和数学期望;
(2)求这只蚂蚁经过5次爬行后,停留在平面
内的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)记这只蚂蚁经过4次爬行后,其爬行的总路程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)求这只蚂蚁经过5次爬行后,停留在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
3 . 设抛物线
的焦点为
,过点
的直线
与抛物线交于
两点,与
轴的负半轴交于
点,已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab39e003dd4544e2ba8a81eac2349b5.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6614916203fe0146d6797138da3db4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a8e65100239e2132262a07753e3a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab39e003dd4544e2ba8a81eac2349b5.png)
您最近一年使用:0次
4 . 甲乙两人进行象棋比赛,约定谁先赢3局谁就直接获胜,并结束比赛.假设每局甲赢的概率为
,和棋的概率为
,各局比赛结果相互独立.
(1)记
为3局比赛中甲赢的局数,求
的分布列和均值
(2)求乙在4局以内(含4局)赢得比赛的概率;
(3)求比赛6局结束,且甲赢得比赛的概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)求乙在4局以内(含4局)赢得比赛的概率;
(3)求比赛6局结束,且甲赢得比赛的概率
您最近一年使用:0次
7日内更新
|
957次组卷
|
4卷引用:山西省晋城市第一中学校2024届高三下学期高考模拟预测数学试题
山西省晋城市第一中学校2024届高三下学期高考模拟预测数学试题天津市崇化中学2023-2024学年高二下学期期中阶段质量检测数学试卷(已下线)专题03 随机变量的分布列--高二期末考点大串讲(人教B版2019选择性必修第二册)(已下线)专题06 离散型随机变量与正态分布--高二期末考点大串讲(苏教版2019选择性必修第二册)
解题方法
5 . 设
,当
变化时
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd54a4134aef3f68a9c068ee4dade284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf27e0ac992edacdf11c649113e9445e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 已知等差数列
的首项为
,公差为
,前
项和为
,若
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.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/d03cb978ad8081c5bb6c9cd21a6a333a.png)
A.当![]() |
B.使得![]() ![]() |
C.![]() |
D.![]() ![]() |
您最近一年使用:0次
7 . 如图所示,已知一质点在外力的作用下,从原点
出发,每次向左移动的概率为
,向右移动的概率为
.若该质点每次移动一个单位长度,设经过5次移动后,该质点位于
的位置,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44601dd2b96423c6b5a76948a3c11db0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 如图,
为圆锥的顶点,
为圆锥底面的圆心,
为底面直径,
为底面圆
的内接正三角形,且
的边长为
,点
在母线
上,且
,
.
,并求三棱锥
的体积;
(2)若点
为线段
上的动点,当直线
与平面
所成角的正弦值最大时,求此时点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6166b9a5437671bcba31e17c375eb39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/348fb71fbc47fd87e9ce011652ef4186.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84be64d28b1623e71ad989f37336b1f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1112ffa328ed486ffc5e4a605eb510e.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
您最近一年使用:0次
解题方法
9 . 设
,则对任意实数
,则
是
的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba7c05a0dc7f162fb73b17101bfe6fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa38a1bd5bc252a8578b23737d0d46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0929250c9250852da75fdc5d207d5f4.png)
A.必要而不充分条件 | B.充分而不必要条件 |
C.充分必要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
10 . 已知椭圆
的离心率为
,双曲线
的离心率为
,两曲线有公共焦点
是椭圆与双曲线的一个公共点,
,以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e12b87e68fdafcb4aee674e8fb754bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33558881906c228c262ff8024dcfc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb7d9de295a3ba97397c1b8e6664690.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33a99190a8fd29c36d5a002e3197cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ed463bf16c78a4bbb9d3acff922afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7affd8a277498fd39b4a2a95d649f45.png)
A.![]() |
B.![]() |
C.![]() |
D.若![]() ![]() |
您最近一年使用:0次