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1 . 有一位老师叫他的学生到麦田里,摘一颗全麦田里最大的麦穗,期间只能摘一次,并且只可以向前走,不能回头.结果,他的学生两手空空走出麦田,因为他不知前面是否有更好的,所以没有摘,走到前面时,又发觉总不及之前见到的,最后什么也没摘到.假设该学生在麦田中一共会遇到
颗麦穗(假设
颗麦穗的大小均不相同),最大的那颗麦穗出现在各个位置上的概率相等,为了使他能在这些麦穗中摘到那颗最大的麦橞,现有如下策略:不摘前
颗麦穗,自第
颗开始,只要发现比他前面见过的麦穗都大的,就摘这颗麦穗,否则就摘最后一颗.设
,该学生摘到那颗最大的麦穗的概率为
.(取
)
(1)若
,
,求
;
(2)若
取无穷大,从理论的角度,求
的最大值及
取最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f5be952cd4b2844b21df7cad1e3d7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b00f4eb7f1bd2ccefbabf0c1dfa8f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dd266684a38a50f7a7925d4bb5e63e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40de5f0592b95bc8b0e9560eae5bad8d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fac3649308b528fd56545ba102dc42d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e69866076dcff686a05e9e91e61e68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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5卷引用:重庆市好教育联盟2024届高三上学期12月联考数学试题
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2 . 曲线C是平面内与两个定点
的距离的积等于
的点P的轨迹,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/125386122811a133ad6e70446900cbc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
A.曲线C关于坐标轴对称 | B.点P到原点距离的最大值为![]() |
C.![]() ![]() | D.点P到y轴距离的最大值为![]() |
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解题方法
3 . 若不等式
对任意的
恒成立,则实数m的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/570670186c0db0f4b37a5a8f12e9e5c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66692ec49a458f9e48c7315d03dfc37b.png)
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4 . 已知正方体
的棱长为
,
是空间中的一动点,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.若点![]() ![]() ![]() ![]() |
B.若点![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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解题方法
5 . 已知椭圆
过点
,
为椭圆
的左右顶点,
为椭圆
上不同于
的动点,直线
的斜率为
满足
.
(1)求椭圆
的方程;
(2)
为椭圆
的左焦点,过右焦点
的直线
交椭圆
于
两点,记
的内切圆半径为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e544ce30f9debf4e626677378bbcbff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9fbe38c61ebc25ea9dd413743fa6577.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ea1c3fe8431260ecb8dffcdae8d570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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解题方法
6 . 如图甲,在矩形
中,
为线段
的中点,
沿直线
折起,使得
点为
的中点,连接
,如图乙.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/40d753e3-9722-418e-a8dc-8e099a6e081d.png?resizew=332)
(1)求证:
;
(2)线段
上是否存在一点
,使得平面
与平面
所成角的余弦值为
?若不存在,说明理由;若存在,求出
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f5e0b08422b2f93d122341b3d7672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d81d73077d45142f21ca67f80633f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35cb5a59879bfa249b9896d3458d43b5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/40d753e3-9722-418e-a8dc-8e099a6e081d.png?resizew=332)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f4946f86dce1600096f79d7716ea03.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977a483bd52c08968f4097d10609be20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a261474cc7607d31a6324cb4df9c8896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
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解题方法
7 . 已知点
为圆
上动点,且
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7b0a68f2caf4bd19e5ea111c83a031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e1f4615d9935b7e72fd8cd5e0fe563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.0 | B.![]() | C.![]() | D.![]() |
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8 . 设
,
是半径为8的球体
表面上两定点,且
,球体
表面上动点
满足
,
,则动点
的轨迹为________ (在直线,圆,椭圆,双曲线,抛物线选择)则点
的轨迹长度为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc1eb76fe74cba30f7cbcde349ba80da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93db236aeeadceb7af44e3a8c84a66e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07340cb542ad6fd879d72dca8663b60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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3卷引用:重庆市三峡名校联盟2023-2024学年高二上学期联考数学试卷
重庆市三峡名校联盟2023-2024学年高二上学期联考数学试卷新疆维吾尔自治区阿克苏地库车市第二中学2023-2024学年高二上学期第二次月考(12月)数学(已下线)第三章 空间轨迹问题 专题三 立体几何轨迹长度问题 微点2 立体几何轨迹长度问题综合训练【培优版】
9 . 设函数
.
(1)讨论函数
的单调性.
(2)设数列
满足
,证明:数列是单调递增数列,且
,
(其中
为自然对数的底).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/436d89f98040d869c912b9193dbbdd45.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83271e8ed836063e7c3ff9f535a7dc2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c408d00eb43d6350af01b2d43dd8b283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
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解题方法
10 . 在
中,
,
,E,F,G分别为三边
,
,
的中点,将
,
,
分别沿
,
,
向上折起,使得A,B,C重合,记为
,则三棱锥
的外接球表面积的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6cfe00768a1c9dcd96d5123ed6b4403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7572ecc467c061ef71cf4486ec63ec3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d20227c155003de7163d407daf0a5e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ff39c7aa648afd1080206c8080ff79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9bbc7e0de28c652ae10a8db5b4e2687.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9卷引用:重庆市部分学校2024届高三上学期第四次联考数学试题
重庆市部分学校2024届高三上学期第四次联考数学试题安徽省“皖江名校联盟”2024届高三上学期12月月考数学试题辽宁省沈阳市第一二〇中学2023-2024学年高三第十次质量监测(最后一卷)数学试题山东省日照市五莲县第一中学2024届高三上学期期末模拟数学试题(已下线)专题04 立体几何初步(1)-【常考压轴题】湖南省长沙市宁乡市第一高级中学2021届高三第二次模拟考试数学试题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(已下线)第八章 立体几何初步(压轴题专练)-单元速记·巧练(人教A版2019必修第二册)(已下线)第八章 立体几何初步(一)(知识归纳+题型突破)(2)-单元速记·巧练(人教A版2019必修第二册)