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)
您最近一年使用:0次
名校
解题方法
2 . 已知函数
.
(1)求曲线
在点
处的切线方程;
(2)当
时,
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0519ab55b1cd35caa55543af772e17da.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4dde954ab58019970e727bac75321e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fb40a36a293471742ce75f6b9635b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcff008a4ed14c3ecc877cb831565a1.png)
您最近一年使用:0次
2024-05-16更新
|
1161次组卷
|
3卷引用:安徽省宣城市广德中学2023-2024学年高二下学期四月月考数学试题
名校
3 . 已知
.
(1)若
,求
的展开式中含
的项;
(2)若
,且
的展开式中含
的项的系数为24,那么当m,n为何值时,
的展开式中含
的项的系数取得最小值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f16391866107d39f2d4df26719994f2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d75f15715ba651225c343e657c91379f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/439e00f0abab91f7a1796ab96dcaeacf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c204be088a8fc6c096eedd5b1e7dc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
您最近一年使用:0次
2024-05-11更新
|
221次组卷
|
2卷引用:安徽省宣城市广德中学2023-2024学年高二下学期四月月考数学试题
名校
解题方法
4 . 已知函数
,且曲线
在点
处的切线方程为
.
(1)求
的极值;
(2)若实数
满足
,记
,求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3202de0354b5adcef860e4b821be086a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ea9824af71c9da5db5a00ec06063024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403cb45dea2e88997e02281a68523092.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e83222280d951ccc5ed63429643430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa0db28df46a7977c90d61a3676f92dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2024-05-09更新
|
942次组卷
|
4卷引用:安徽省宣城市广德中学2023-2024学年高二下学期四月月考数学试题
名校
5 . 已知常数
,在成功的概率为
的伯努利试验中,记
为首次成功时所需的试验次数,
的取值为所有正整数,此时称离散型随机变量
的概率分布为几何分布.
(1)对于正整数
,求
,并根据
,求
;
(2)对于几何分布的拓展问题,在成功的概率为
的伯努利试验中,记首次出现连续两次成功时所需的试验次数的期望为
,现提供一种求
的方式:先进行第一次试验,若第一次试验失败,因为出现试验失败对出现连续两次成功毫无帮助,可以认为后续期望仍是
,即总的试验次数为
;若第一次试验成功,则进行第二次试验,当第二次试验成功时,试验停止,此时试验次数为2,若第二次试验失败,相当于重新试验,此时总的试验次数为
.
(i)求
;
(ii)记首次出现连续
次成功时所需的试验次数的期望为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eaba847ce18eb7fb4a9b2e12f6099c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(1)对于正整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef133b0fd53a48310a82c18729575abd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13d9063d13b42af1249e6f83208482cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf3baba074e8aeb6f3ea117865bbd1b.png)
(2)对于几何分布的拓展问题,在成功的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e599def7fc8d58e1f4f70e3f94e1cb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0f0ab88512620afb30d306754460263.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4f150ab98bde511e0f65d9bafab031.png)
(ii)记首次出现连续
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a78b3c84e7818ed70018eea40c72665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a78b3c84e7818ed70018eea40c72665.png)
您最近一年使用:0次
2024-04-26更新
|
2290次组卷
|
4卷引用:安徽省宣城市广德中学2023-2024学年高二下学期四月月考数学试题
名校
6 . 在平面直角坐标系中,直线l与抛物线
交于
、
两点,点
在抛物线上,
是
轴上一动点.
(1)求直线l和抛物线
的解析式;
(2)如图1,
为抛物线
上位于直线l下方一动点,过
作
垂直于x轴交直线l于
,当线段
长度最大时,求
的最大值;
(3)如图2,
为抛物线
的顶点,y轴上是否存在点M,使得
?若存在,求出点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2f3a811787b14bcabdb6a4cd49da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0898eaf39239999c25447d0512c95f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585739fbbb741c51cdecdb39c30c0ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e20ba7e4b42a007bf8c2846bcab995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/9/874cbdb3-fff4-4ddc-be75-e24328eb7b84.png?resizew=299)
(1)求直线l和抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
(2)如图1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d82bbfaf8a2aa02ec01210b8b6fa8d13.png)
(3)如图2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb02779236aff6a174a29dff0b2524f0.png)
您最近一年使用:0次
名校
7 . 如图,圆内接四边形ABCD中,G为对角线AC、BD的交点,过点D作
交AC于E,且
,F在线段GD上,且
,连接CF.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/4bd1187a-ba53-4a8b-9c6f-9dcef6fc6fb6.png?resizew=170)
(1)求证:
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe7eaf967808dad0a184eeedfa27721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c16639200620d92e1a8c228b581dc57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7953310f793ba2a127772d593b41aff0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/4bd1187a-ba53-4a8b-9c6f-9dcef6fc6fb6.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f1b8f2d3052769ed15da4dcdaad203.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb4a99e41e4a30238de487e733e01ef.png)
您最近一年使用:0次
8 . 在平面直角坐标系中,直线
交曲线
于A、B两点,交x轴于点C,过点A作
轴于点D,且
,连接BD.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/add631ea-2585-4890-9d86-c47bcc8081d0.png?resizew=152)
(1)若A点的坐标为
,求线段AB的长;
(2)若
,且
的面积为3,求k的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1133fb905c01a6866c2e98e91d35d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03517310ea1e913f709753592ac65ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5d3a0273d1f3046dfad2086d0df56c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90966e8334b3288f4fd3589a6ec45d4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/7/add631ea-2585-4890-9d86-c47bcc8081d0.png?resizew=152)
(1)若A点的坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bedaa50ecdc072fae79a33763780f52c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98fc4043b2b7fbb5a0608d504629b206.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb961bd7db3adb76af2d4cedb611bd7.png)
您最近一年使用:0次
9 . 解下列关于x、y、z的方程组:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd00923d5a8e5670674429cce415b98.png)
您最近一年使用:0次
10 . 已知二次函数
(a为常数).
(1)当
,
时,求
的值;
(2)当
时,二次函数
的最小值为
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822e1d5acaa60803c97eec89a903183d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7f8363ae7e8fb0020856303ad61514.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a12a30935c79ae769818043a496f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822e1d5acaa60803c97eec89a903183d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
您最近一年使用:0次