名校
解题方法
1 . 某学校有甲、乙、丙三家餐厅,分布在生活区的南北两个区域,其中甲、乙餐厅在南区,丙餐厅在北区各餐厅菜品丰富多样,可以满足学生的不同口味和需求.
附:
;
(1)现在对学生性别与在南北两个区域就餐的相关性进行分析,得到下表所示的抽样数据,依据
的独立性检验,能否认为在不同区域就餐与学生性别有关联?
(2)张同学选择餐厅就餐时,如果前一天在甲餐厅,那么后一天去甲,乙餐厅的概率均为
;如果前一天在乙餐厅,那么后一天去甲,丙餐厅的概率分别为
:如果前一天在丙餐厅,那么后一天去甲,乙餐厅的概率均为
.张同学第1天就餐时选择甲,乙,丙餐厅的概率分别为
.
(i)求第2天他去乙餐厅用餐的概率;
(ii)求第
天他去甲餐厅用餐的概率
.
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2a75f2f332c9e20717bd0c2d43173fa.png)
![]() | 0.100 | 0.050 | 0.025 | 0.010 |
![]() | 2.706 | 3.841 | 5.024 | 6.635 |
(1)现在对学生性别与在南北两个区域就餐的相关性进行分析,得到下表所示的抽样数据,依据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31cbe1ab3e6cd7281b2ea886dd0cd9b.png)
性别 | 就餐区域 | ||
南区 | 北区 | ||
男 | 33 | 10 | 43 |
女 | 38 | 7 | 45 |
合计 | 71 | 17 | 88 |
(2)张同学选择餐厅就餐时,如果前一天在甲餐厅,那么后一天去甲,乙餐厅的概率均为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05a61c66188d19bf2b2b7ab177be7cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32be9591e72e196813dea4242226988.png)
(i)求第2天他去乙餐厅用餐的概率;
(ii)求第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/729881c9561e9d002923d87bb2a6e211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d942107496f87f27abe592d8c3c1a0.png)
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名校
解题方法
2 . 在边长为2的正方形
中,
,
分别为
,
的中点,沿
、
及
把这个正方形折成一个四面体,使得
、
、
三点重合于点
,得到四面体
,顶点
在底面
上的射影为
,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/922dae27e2bef111979574e15de3a4cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
A.![]() |
B.点![]() ![]() |
C.点![]() ![]() |
D.![]() |
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解题方法
3 . 已知平面向量
,
,且
,
,向量
满足
,则
取最小值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
_________________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a5451e35042092a0cdc5971a4d55e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37157acb52896b1d3d067adc7d381b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d3e5619718e1bb2592caf48bcc2718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5b0a4509691f41732a190fceef0175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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4 . 如图所示数阵,第
行共有
个数,第
行的第1个数为
,第2个数为
,第
个数为
.规定:
.
(2)从第1行起,每一行最后一个数依次构成数列
,设数列
的前
项和为
,是否存在正整数
,使得对任意正整数
,
恒成立?如存在,请求出
的最大值;如不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5726ebd95b22e5f7971028479790df77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0623207595425920f16e76a7f8f268b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29a285201fd7e0ad70fa7431cb89a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0749c4129afc0c704155f522290b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee754f9af67705c16c167733b5ef75db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5222268dda9dcb9b660f3cbedbb37757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9ef9ec4340eabb42722042c65cc60d8.png)
(2)从第1行起,每一行最后一个数依次构成数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76aef4cdcb5af742ce28003b7b6c8c20.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/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23e8660fb54ba32b037b392b75316087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
5 . 已知正方体
的棱长为1,点P是底面正方形
对角线
上一动点(含端点),则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
A.![]() ![]() |
B.三棱锥![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.以![]() ![]() ![]() |
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6 . 已知函数
,
(1)讨论
的单调性;
(2)若
存在两个零点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(ⅰ)求a的取值范围;
(ⅱ)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af2ee3664a4cd7fd377b23485fd14c83.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(ⅰ)求a的取值范围;
(ⅱ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9d26d79e6a09476dc5a0d372c24867.png)
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7 . 甲、乙、丙三人相互做传球训练,第1次由甲将球传出,每次传球时,传球者都等可能地将球传给另外两个人中的任何一人,则第3次传球后球在乙手中的概率为________ ,第n次传球后球在乙手中的概率为________ .
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2卷引用:广东省佛山市南海区第一中学2023-2024学年高二下学期阶段三暨期末统考模拟检测数学试题
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8 . 已知函数
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45f1d8728779d4e4b0534a5c1721602.png)
A.函数![]() ![]() ![]() |
B.函数![]() |
C.函数![]() ![]() |
D.函数![]() |
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昨日更新
|
48次组卷
|
2卷引用:广东省佛山市南海区第一中学2023-2024学年高二下学期阶段三暨期末统考模拟检测数学试题
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解题方法
9 . 已知函数
,若存在
恒成立,则称
是
的一个“上界函数”,如果函数
为
的一个“上界函数”.
(1)求实数
的取值范围;
(2)证明:若方程
有两个解
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6263576e5c3f2324a8dac311476bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e653994b245fbdc2ac3458429c65e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ee140b690cece0721aa014811c3573.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)证明:若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b725fdc8de9800f2692f6fea8585b1e9.png)
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10 . 已知函数
.
(1)当a=1时,求曲线
在点
处的切线方程;
(2)讨论函数
的单调性;
(3)若
的有三个零点,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba17f18c17d3d9f4145022baeb5c72bb.png)
(1)当a=1时,求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea9824af71c9da5db5a00ec06063024.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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