2020·全国·模拟预测
名校
1 . 已知正方体
的棱长为2,
是
的中点,过点
的平面
满足
平面
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34cf61780928291d51c7bbb08a5fcf81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.平面![]() |
B.平面![]() ![]() |
C.点![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() ![]() |
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2 . 某制药公司研制了一款针对某种病毒的新疫苗.该病毒一般通过病鼠与白鼠之间的接触传染,现有
只白鼠,每只白鼠在接触病鼠后被感染的概率为
,被感染的白鼠数用随机变量
表示,假设每只白鼠是否被感染之间相互独立.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f0528c14-a111-4be5-8f43-28a868101679.png?resizew=368)
(1)若
,求数学期望
;
(2)接种疫苗后的白鼠被病鼠感染的概率为
,现有两个不同的研究团队理论研究发现概率
与参数
的取值有关.团队
提出函数模型为
,团队
提出函数模型为
.现将白鼠分成10组,每组10只,进行实验,随机变量
表示第
组被感染的白鼠数,现将随机变量
的实验结果
绘制成频数分布图,如图所示.假设每组白鼠是否被感染之间相互独立.
①试写出事件“
”发生的概率表达式(用
表示,组合数不必计算);
②在统计学中,若参数
时使得概率
最大,称
是
的最大似然估计.根据这一原理和团队
,
提出的函数模型,判断哪个团队的函数模型可以求出
的最大似然估计,并求出估计值.
参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/f0528c14-a111-4be5-8f43-28a868101679.png?resizew=368)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2271b2588b659d5c2b466afd1e39359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc79c66ebaacd709ec9965b90a22b14.png)
(2)接种疫苗后的白鼠被病鼠感染的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bd8e3bba8f56dafb5d52fe34d3cf7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61dcc2581dbddc8a76ce9a987a92ddaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/820ef5942e54b4e9726d0d68846ac718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a451743fb161d7f306e5ede38b5b7922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a451743fb161d7f306e5ede38b5b7922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9e5e9fb519cf75f4682c402b083ca23.png)
①试写出事件“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a168646663fae1ed924ab8988108d41f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
②在统计学中,若参数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ba7a71c56fe7355a2b3ad5bade55ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b0d5649ec6dea09072c9fadabccccf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a4438bae1705c0f26beddf41322c087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](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/c24095e409b025db711f14be783a406c.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfe3b5856f033cb12165d98226bff75.png)
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5卷引用:重庆市綦江实验中学2021届高三上学期12月月考数学试题
重庆市綦江实验中学2021届高三上学期12月月考数学试题重庆市第八中学2021届高三上学期高考适应性月考(四)数学试题(已下线)【2023】【高二下】【期中考】【367】【高中数学】【马定超收集】(已下线)专题9-1 概率与统计及分布列归类(理)(讲+练)-1(已下线)第四篇 概率与统计 专题8 最大似然估计 微点2 最大似然估计综合训练
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3 . 已知函数
.
(1)求
在
上的最大值;
(2)判断
的零点个数,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da128378f1bea8714238b19a06a117f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdfed8d6862125dc1fecfce0322a750.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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2卷引用:重庆市綦江实验中学2021届高三上学期12月月考数学试题
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4 . 已知
是抛物线
的焦点,斜率为
的直线
过点
且与抛物线
交于
,
两点,线段
的中点为
.
(1)证明:
为定值,并求出该定值;
(2)以
为直径作圆
,设圆
与
轴交于点
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3511cdc6a9b56bc1d9415d3d94ef0f67.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797eaac99cd595fb2b8df9ef38fa8069.png)
(2)以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/9b537d1ae7648cdeebb5adf19721356d.png)
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5 . 如图,在四棱锥
中,
是以
为斜边的等腰直角三角形,
,
,
,
,
为
上一点.
![](https://img.xkw.com/dksih/QBM/2020/12/24/2621261692698624/2624813725278208/STEM/11a76621-9e58-44d8-b875-ab452ba3df20.png)
(1)若
为
的中点,证明:
平面
;
(2)若直线
与底面
所成角的正弦值为
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9026fbd7897d459b4d559a4b99f2e41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88929f4ba0851730d5f941d426b87548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c58bafdd3bb54ba3491b49ab60b172f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4e4b72607f34923d90890c25475449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae774b98a2a4897967c89095fccb7c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2783c8a27da6f95a077d9e7f8e47d386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
![](https://img.xkw.com/dksih/QBM/2020/12/24/2621261692698624/2624813725278208/STEM/11a76621-9e58-44d8-b875-ab452ba3df20.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0138efef1aa28c5b2b1063426ad87a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da035673ef0edcfae6b72fb5e5ba34a.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6b41d4070854edfaa24071137b314cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8067cbba862cec3ae86b5e14878c5bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/873495e2ad831527b8c6559c0641a7f2.png)
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3卷引用:重庆市綦江实验中学2021届高三上学期12月月考数学试题
重庆市綦江实验中学2021届高三上学期12月月考数学试题重庆市第八中学2021届高三上学期高考适应性月考(四)数学试题(已下线)第34讲 利用坐标法解决立体几何的角度与距离问题-2022年新高考数学二轮专题突破精练
名校
6 . 设
,函数
的最小正周期为
.
(1)求
的单调递增区间;
(2)若存在
,使得
关于直线
的对称点在曲线
上,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/219e526faaa7fb02d01ec55b947a9dfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebb1a71911d602df6286670eb4661372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0573a6bcc480a91a43126d01bc19eeae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60b49815c5c25b48e6c74d7077851a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa35a7b967fbfd53b79078785eddd838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ff0e5c78c04beea4e773185195da30.png)
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解题方法
7 . 已知数列
,
,
,
.
(1)求数列
为等比数列,求
;
(2)若
且数列
的前
项和为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57bfc1f8772f31748bfdc280d0712fc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dcb582191f3c4690817af7fe4b5b28b.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2de706dc5f0439b989273a5367f63a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f8b8313e2257186e481522d37c59ab0.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/100fcebcea64120f68f80b40f198f442.png)
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2卷引用:重庆市綦江实验中学2021届高三上学期12月月考数学试题
8 . 设
是双曲线
的左右焦点,过
作
的一条渐近线的垂线
,垂足为
.且
与双曲线的右支相交于点
,若
,且
.则
的面积为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e188974602dcfc3cde507f18993c9a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34f385bb053c73a6beaacbc4638609e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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名校
解题方法
9 . 在
的展开式中
的系数为-11,
的奇次项的系数和为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b3e7b38a9ab93df094d097c3c02f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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名校
10 . 某旅行社为某旅行团包机去旅游,其中旅行社的包机费为16000元,旅行团中每人的飞机票价按以下方式与旅行社结算:若旅行团的人数在35人或35人以下,每张机票收费900元;若旅行团的人数多于35人,则给予优惠,每多1人,每张机票减少20元,但旅行的人数最多不超过60人,则当旅行社获得的机票利润最大时,旅行团的人数为_______ .
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2卷引用:重庆市綦江实验中学2021届高三上学期12月月考数学试题