1 . 近年来,中国新能源汽车产业,不仅技术水平持续提升,市场规模也持续扩大,取得了令人瞩目的成就.以小米SU7、问界M9等为代表的国产新能源汽车,正逐步引领全球新能源汽车的发展潮流,某新能源汽车制造企业对某地区新能源汽车的销售情况进行了调研,数据如下:
(1)已知y与x线性相关,求出y关于x的线性回归方程,并估计该地区新能源汽车在2024年5月份的销量;
(2)该企业为宣传推广新能源汽车,计划在宣传部门开展人工智能工具使用的培训.该次培训分为四期,每期培训的结果是否“优秀”相互独立,且每期培训中员工达到“优秀”标准的概率均为
.该企业规定:员工至少两期培训达到“优秀”标准.才能使用人工智能工具,
(i)记某员工经过培训后,恰好两期达到“优秀”标准的概率为
.求
的最大值点
;
(ii)该企业宣传部现有员工100人,引进人工智能工具后,需将宣传部的部分员工调整至其他部门,剩余员工进行该次培训已知开展培训前,员工每人每年平均为企业创造利润12万元,开展培训后,能使用人工智能工具的员工预计每人每年平均为企业创造利润16万元,本次培训费每人1万元.现要求培训后宣传部员工创造的年利润不低于调整前的年利润,以(i)中确定的
作为p的值.预计最多可以调多少人到其他部门?
参考公式:
,
.
时间 | 2023年12月 | 2024年1月 | 2024年2月 | 2024年3月 | 2024年4月 |
月份代码x | 1 | 2 | 3 | 4 | 5 |
销量y/千辆 | 14 | 15 | 16 | 18 | 19 |
(2)该企业为宣传推广新能源汽车,计划在宣传部门开展人工智能工具使用的培训.该次培训分为四期,每期培训的结果是否“优秀”相互独立,且每期培训中员工达到“优秀”标准的概率均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8578f06897aa6fb84aa95c797d3d8.png)
(i)记某员工经过培训后,恰好两期达到“优秀”标准的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1f109f79547d6ae0d94339e689e8f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed1f109f79547d6ae0d94339e689e8f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606c4a853a6a34cb7f33bea81b15a1f.png)
(ii)该企业宣传部现有员工100人,引进人工智能工具后,需将宣传部的部分员工调整至其他部门,剩余员工进行该次培训已知开展培训前,员工每人每年平均为企业创造利润12万元,开展培训后,能使用人工智能工具的员工预计每人每年平均为企业创造利润16万元,本次培训费每人1万元.现要求培训后宣传部员工创造的年利润不低于调整前的年利润,以(i)中确定的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606c4a853a6a34cb7f33bea81b15a1f.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526e9468a69101c351c5bf382c835c30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8112f4d3ab5f8ec8405fe32fd181ce32.png)
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2 . 甲乙两人参加知识竞赛活动,比赛规则如下:两人轮流随机抽题作答,答对积1分且对方不得分,答错不得分且对方积1分,然后换对方抽题作答,直到有领先2分者晋级,比赛结束.已知甲答对题目的概率为
,乙答对题目的概率为P,答对与否相互独立,抽签决定首次答题方,已知两次答题后甲乙两人各积1分的概率为
.记甲乙两人的答题总次数为
.
(1)求P;
(2)当
时,求甲得分X的分布列及数学期望;
(3)若答题的总次数为n时,甲晋级的概率为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3b5b9038b39e659fdade4a5063edad.png)
(1)求P;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38c9d7f7f9a3e9ec476f5cf7fda97c88.png)
(3)若答题的总次数为n时,甲晋级的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb61ad9ef2dcb36f21d5979e21cfe10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b63edd22b23f84960e7c5e07102e0b9.png)
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7日内更新
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249次组卷
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2卷引用:江苏省海门中学2023-2024学年高二下学期5月学情调研数学试卷
3 . 空间内一点P可用三个有次序的数
来确定,其中r为原点O与点P间的距离;
为有向线段
与z轴正向的夹角;
为从正z轴来看自x轴按逆时针方向转到
所转过的角,这里M为点P在
面上的投影,这样的三个数
叫做点P的球面坐标,其中
,
,
,如图所示. 球面距离是指球面上两点之间的最短路径长度,这条路径是通过这两点的大圆上的劣弧(大圆是过球心的平面与球面相交形成的圆).
,
,求A,B间的球面距离;
(2)若
,
,记P,Q间的球面距离为d,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cef479716723efbb3e7fdc71e1a7904c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ed74dbeba7d418a559f9c97c1df414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b870a01c388175a446747d5fdaa0bf4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363136f32811f5f8424775d6fb5a4897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daac76dc6806917c5d76429d503aaed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80a89e5af8bee9f1815f52cb1db3022.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3be4358b49a194e363f77a604bc5dff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdca5d42af7a42337f5559a7d0babc1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ed3ae064cd66c85f3f4a21fba7a81c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dda2a523239e2bfd6cd958533ac087ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bfcbb2c0f8bf457a33aeba31d95c8f.png)
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解题方法
4 . 已知箱中有若干个大小相同的红球和白球,每次抽一个球,若抽到白球,则放回并再次抽球,若抽到红球,则不再抽取.设每次抽到红球的概率为p(
),记X为停止抽球时所抽取的次数,X的数学期望为
.
(1)若最多抽4次,且
,求X的分布列及数学期望;
(2)在成功概率为p(
)的伯努利试验中,记X为首次成功时所需的试验次数,X的取值为所有正整数,此时称离散型随机变量X的概率分布为几何分布.若抽球一直进行下去,则X服从几何分布.
①求恰好第k次抽到红球的概率
;
②求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c11f6c800b8e0410674a0c6d307d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3baba074e8aeb6f3ea117865bbd1b.png)
(1)若最多抽4次,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e5a154944cfae71a14d3da122dd08e.png)
(2)在成功概率为p(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c11f6c800b8e0410674a0c6d307d26.png)
①求恰好第k次抽到红球的概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef133b0fd53a48310a82c18729575abd.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3baba074e8aeb6f3ea117865bbd1b.png)
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5 . 设
为1,2,3,…,n的一个排列,若该排列中有且仅有一个i满足
,则称该排列满足性质T.对任意正整数n,记
为满足性质T的排列
的个数.
(1)求
的值;
(2)若
,求满足性质T的所有排列的情形;
(3)求数列
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aefec328416eae477726adce1a7705f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82e260b088f071983f254ce8f5163fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9304e71a623c4412188a800046a970d0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367c96a0ff95b92877eda2a7c98871e1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
(3)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a77316e06c00a9086be642f7f590684.png)
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6 . 设集合
为
的非空子集,随机变量X,Y分别表示取到子集
中的最大元素和最小元素的数值.
(1)若
的概率为
,求
;
(2)若
,求
且
的概率;
(3)求随机变量
的均值
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a6a4cff8424ced7841221e2d54d95d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c4b25a0b76fba785d5769c08714b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ab109ec88d6f3d24b2f01ca77e7038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe08722cf9300fe188dbbb71989c06c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32a2f594955e456f0fddad1e090bb04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8b3576b4d98a5b4ddc380ddaa0fa281.png)
(3)求随机变量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9f6ea6346066054b5c722763d6b026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f8506fbcb1fae930e1503065b9327a.png)
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2024-06-16更新
|
99次组卷
|
2卷引用:河南省信阳市新县高级中学2024届高三数学考前仿真冲刺卷
名校
7 . 若数列
的各项均为正数,且对任意的相邻三项
,都满足
,则称该数列为“对数性凸数列”,若对任意的相邻三项
,都满足
则称该数列为“凸数列”.
(1)已知正项数列
是一个“凸数列”,且
,(其中
为自然常数,
),证明:数列
是一个“对数性凸数列”,且有
;
(2)若关于
的函数
有三个零点,其中
.证明:数列
是一个“对数性凸数列”:
(3)设正项数列
是一个“对数性凸数列”,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5323231f6376db726f6fba9dd53b97a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345367d7aac000974ce1e3cf4ce1b15a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5323231f6376db726f6fba9dd53b97a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/870910beaaf7bd60242701ad7ddaf06b.png)
(1)已知正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a11176eb502db16e19c38278b77e08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1e49907ec00414cee66b1d082183fb.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fe507c4d73de71c69ede4cfbdc7fb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02ab7609f5b06fc564e8e588f378870.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a447e5baee4f7518706498d4aca7553b.png)
(3)设正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5330adb65f6c8bd64d0cad579ad2910c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca2b0946db9bbcbce5f19507f5c485e.png)
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8 . 已知点
是双曲线
上一点,
在点
处的切线与
轴交于点
.
(1)求双曲线
的方程及点
的坐标;
(2)过
且斜率非负的直线与
的左、右支分别交于
.过
做
垂直于
轴交
于
(当
位于左顶点时认为
与
重合).
为圆
上任意一点,求四边形
的面积
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177ae4fa30cba0272d338973b8f7bdf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/221820d5f6209f9888cb0965bf99b1d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be452c8bdea6b4e4c7a6d96e9dc6a51c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/946dd11e61102ea4ce0772603ae4edf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da460ebf2fef232e43904aab520cd01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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9 . 在平面直角坐标系
中,已知椭圆
的左、右焦点为
.
(1)若直线
与
轴相交于点
,
到直线
的距离为
,求
;
(2)若
,点
为椭圆
上的任意一点,设椭圆
的上、下顶点分别为
,记
的面积为
,
的面积为
,若
,求
的取值范围;
(3)若
,过点
的直线与椭圆交于
两点(
在
的上方),线段
上存在点
,使得
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3115e446aa63fabd996db9f5c39a7df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061af1c7a4480004221e253d813efe07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a61d572ecf27dc02fcbd588f24647b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c10e33a64f5c35e60200b76524a5a83.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/237c115d5b39d761e1cbcae031070b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd8065fd9fe33e0b71d5933909f5c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808e0252f83af175e937db769f045a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddc18ef823feb3a4bf0737f3446f99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb0c703f6effcbcf1770569971b3cd2.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df46b800478f98f9f7b4f4c51a90a4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e42e19bb44c47d716c3c65034bf7aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/593449de4253fc9f6f7e6a48a50d4a15.png)
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10 . 收集一些用列表法表示的函数.
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