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1 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b052e0ebdfbeb7318c5c3d52a254a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4cc02db139298a1793c70a3278bb323.png)
A.![]() | B.14 | C.![]() | D.7 |
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解题方法
2 .
年九省联考后很多省份宣布高考数学采用新的结构,多选题由
道减少到
道,分值变为一题
分,多选题每个小题给出的四个选项中有两项或三项是正确的,全部选对得
分,有错选或全不选的得
分
若正确答案是“两项”的,则选对
个得
分
若正确答案是“三项”的,则选对
个得
分,选对
个得
分
某数学兴趣小组研究答案规律发现,多选题正确答案是两个选项的概率为
,正确答案是三个选项的概率为
其中
.
(1)在一次模拟考试中,学生甲对某个多选题完全不会,决定随机选择一个选项,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
,求学生甲该题得
分的概率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)针对某道多选题,学生甲完全不会,此时他有三种答题方案:
Ⅰ
随机选一个选项
Ⅱ
随机选两个选项
Ⅲ
随机选三个选项.
若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
,且学生甲选择方案Ⅰ,求本题得分的数学期望![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
以本题得分的数学期望为决策依据,
的取值在什么范围内唯独选择方案Ⅰ最好
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0474a66dcdf88bde5beabc5adbd58402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8a15a5ae975912f37b876cbf8c546fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c27aefc2917776f72f95c675b638d20.png)
(1)在一次模拟考试中,学生甲对某个多选题完全不会,决定随机选择一个选项,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
(2)针对某道多选题,学生甲完全不会,此时他有三种答题方案:
Ⅰ
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3493090ac9f2ba0670c837f08154da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3493090ac9f2ba0670c837f08154da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3493090ac9f2ba0670c837f08154da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3067f0f3fe2606168b402a956e73d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1d918e7fb74176679d526cdfc8fa16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1756e209e9538fc4348d9cab8caac438.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82bbee662e242611afdbdae4b8a36a7c.png)
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5卷引用:重庆市求精中学校2023-2024学年高二下学期第二阶段考试数学试题
重庆市求精中学校2023-2024学年高二下学期第二阶段考试数学试题福建省南安市侨光中学2023-2024学年高二下学期第2次阶段考试(5月月考)数学试题(已下线)专题04 随机变量及其分布类常考题型归类--高二期末考点大串讲(人教B版2019选择性必修第二册)山东省淄博实验中学2023-2024学年高二下学期第二次诊断考试(6月月考)数学试题江西省宜春市樟树中学2024届高三下学期高考数学仿真模拟试卷
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3 . 若函数
有两个极值点,则实数
的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f2da0dad495665a37d83c9bfe238eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 如图是一块高尔顿板示意图:在一块木板上钉着若干排互相平行但相互错开的圆柱形小木钉,小木钉之间留有适当的空隙作为通道,前面挡有一块玻璃,将小球从顶端放入,小球在下落过程中,每次碰到小木钉后都等可能地向左或向右落下,最后落入底部的格子中,格子从左到右分别编号为1,2,3,……,6,用X表示小球落入格子的号码,则下面结论中正确的序号是__________ .
;②
;
③
;④
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b196300456a3e6c368af80ae346814d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/335951ad44c0be337306012ad9808b94.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45cdfb90712c6e2f3a26f9eb5eb3e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a2abddc4afefa145459ace6bc8598ec.png)
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5 . 中国南北朝时期的著作《孙子算经》中,对同余除法有较深的研究.设
为整数,若
和
被
除得的余数相同,则称
和
对模
同余,记为
.若
,
,则
的值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5924004836cc5973c0a701a67c50d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73aeb67aa5fa6797d0a68cfbf1a3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f82e83349efc625e006bb5636141d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4cfa5382e39e85e6acc1a98dcdac55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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3卷引用:重庆市杨家坪中学2023-2024学年高二下学期第二次月考数学试题
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6 . 如图,一个质点在随机外力的作用下,从原点O出发,每次等可能地向左或向右移动一个单位长度,共移动8次,则质点经过
最终到达2的位置的概率为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
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7 . 若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/581d6b5cfb5937b8f44acf8f9faebeb8.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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3卷引用:重庆市求精中学校2023-2024学年高二下学期第二阶段考试数学试题
重庆市求精中学校2023-2024学年高二下学期第二阶段考试数学试题福建省南安市侨光中学2023-2024学年高二下学期第2次阶段考试(5月月考)数学试题(已下线)高二数学下学期期末模拟--高二期末考点大串讲(苏教版2019选择性必修第二册)
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解题方法
8 . 已知椭圆
:
,焦点为
,
,椭圆上有一点
.
(1)求椭圆
的标准方程;
(2)过点
的直线交椭圆
于
,
两点,过
作
轴的垂线交椭圆于另一个点
,求证直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28bda5b4d2df3a2373e72cb39b33ce85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae470fe8ca2025aa7a55e53e2ab254d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c022a0f489482baa4b515de1b1a9a8b7.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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9 . 已知定义在
上的函数
(
),设
的最大值和最小值分别为
,
,则
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e2271b12e6583e660296c8eade23c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 已知
,
,
,则下列结论正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/254aebe3ef7eabdf41e46c1cd857c705.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() ![]() |
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