1 . 已知双曲线
,过
的直线
与双曲线
的右支交于
两点.
(1)若
,求直线
的方程,
(2)设过点
且垂直于直线
的直线
与双曲线
交于
两点,其中
在双曲线的右支上.
(i)设
和
的面积分别为
,求
的取值范围;
(ii)若
关于原点对称的点为
,证明:
为
的垂心,且
四点共圆.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4058fc45c49e6710ba7e273cb7888704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35366652793f9994cc34b40d9d9af59a.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/f6bce3d91ca23b86d8c6625f2632e437.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50720d25f774f64e9fe68c211adbe69b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.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/ac047e91852b91af639feec23a9598b2.png)
(i)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0023c9e8e0fec24d3aa77d09b2e4e62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c21cbb1c2bcbcb8391ac5a879f2ae0.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d36626c9e45a25e8dc5bf4be4dbbfb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b31315f53b6087e1584f416cae3453b.png)
您最近一年使用:0次
解题方法
2 . 某植物科学研究所的最新研究表明:某种乔木类植物在沙漠中很难生存,主要原因是沙漠水土流失严重,土壤中的养料和水分相对贫瘠且该乔木类植物根系不发达.实验组调配出含钙、钾两种促进植物根系生长的生长液,将该种乔木类植物的幼苗放置在合适的环境下且每天加入等量的生长液进行培养,并记录前5天该乔木类幼苗的高度
与天数
的数据,如下表所示:
(1)若该实验小组通过作散点图发现
与
之间具有较强的线性相关关系,试用最小二乘法求出
关于
的经验回归方程
.
(2)一般认为当该乔木类幼苗高度不小于
时即可移栽到自然条件下进行种植.若在不加生长液的条件下培养,该乔木类幼苗达到移栽标准的最短培养时间一般为18天,利用(1)中的回归方程预测加了生长液后最短培养时间比不加生长液时缩短了多少天.
参考公式:在经验回归方程
中,
.
参考数据:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a8e2712494bc2022c30d37e395cf10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | 1 | 2 | 3 | 4 | 5 |
![]() | 7 | 10 | 12 | 16 | 20 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
(2)一般认为当该乔木类幼苗高度不小于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c2c458557c1fdd6bdfd0d6cc058987b.png)
参考公式:在经验回归方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa6528690a49d3c43d85f57c7f1d132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb66945fb0084c8c9caef2a5c14b0464.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88294df1f1a3e64069a2eaeb247504e4.png)
您最近一年使用:0次
3 . 已知数列
的各项均为正数,
,且
.
(1)求证:数列
是等差数列;
(2)若数列
满足
,是否存在正整数m;使得
成立,并说明理由.
(3)设
,数列
是以4为首项,2为公比的等比数列,现将数列
中剔除
的项后、不改变其原来顺序所组成的数列记为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14835bf3f00139ccec0694d0924db795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13329a5b1517d73967dbf217d0e6eec3.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cf1da18d91f7c98086553d157d1a87.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce6088528ede0b8d923daf74c0ecd2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f8584e2a691794f6a27974ffa282866.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3491afd226c04a1c159ce261af8510ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272b44a71d0bec02b3c4f3f05304f942.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a4ac00908d2c853f18a3bf0183dc233.png)
您最近一年使用:0次
名校
4 . 对任意两个非零向量
,
,定义:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2880d03a4fe19b30857292e07a7bb29d.png)
(1)若向量
,
,求
的值;
(2)若单位向量
,
满足
,求向量
与
的夹角的余弦值;
(3)若非零向量
,
满足
,向量
与
的夹角是锐角,且
是整数,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2880d03a4fe19b30857292e07a7bb29d.png)
(1)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dba6c7eb6216014862640716991326a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22249dd883332a917ec68eaf7dd5ea23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2eb893d1367e26f4388ae4280f78630.png)
(2)若单位向量
![](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/dcb0319e46d3d669c9439537e600c461.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bca35e52b8430246a1cf96e9e617cce.png)
(3)若非零向量
![](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/aaaa5755983415a0dd11a44c4f426efa.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/189301a0467dfa2daf6b5806d15bfa22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dd1004f81418675f8cfac07219d59c.png)
您最近一年使用:0次
昨日更新
|
614次组卷
|
6卷引用:吉林省部分名校2023-2024学年高一下学期联合考试数学试题
吉林省部分名校2023-2024学年高一下学期联合考试数学试题(已下线)专题03 平面向量的数量积常考题型归类-期末考点大串讲(人教B版2019必修第三册)重庆市璧山来凤中学等九校联考2023-2024学年高一下学期5月月考数学试题(已下线)【高一模块三】类型1 新定义新情境类型专练山东省泰安市新泰市第一中学老校区(新泰中学)2023-2024学年高一下学期第二次月考数学试题(已下线)第2套 全真模拟卷 (中等)【高一期末复习全真模拟】
解题方法
5 . 某同学参加科技知识网络挑战赛,依次回答从系统题库中随机选择的试题,每题作答完毕后,可以选择继续答题,或者结束比赛,系统计算比赛得分.已知该同学答对每道题的概率均为
,且每次答题相互独立.
(1)已知
,若该同学连续作答30道试题后结束比赛,记该同学答对
道试题的概率为
,则
为何值时,
取得最大值?
(2)已知
,若该同学选择连续作答
道试题后结束比赛的概率为
,
,求该同学恰好答错2道试题的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fed1be8b7e50f18cb90077d9fce8e4.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e74b0aa7a6f6dcab7d9101b98504ae2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f81f2a0196b06fc56a7e8a6463d179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f81f2a0196b06fc56a7e8a6463d179.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a18d2bd429301b5478dcd26c572266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3f16923163f3c948a4cc4a713bc1160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7304f4a3860fb2ce6535b51166d21446.png)
您最近一年使用:0次
解题方法
6 . (1)已知P是直线
上一点,
(
为实数,且
),点
的坐标分别为
,求点P的坐标
.
(2)已知平面上三点A、B、C的坐标分别是
,小明在点B处休憩,有只机器狗沿着
所在直线来回跑动.当机器狗在什么位置时,离小明最近?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a949c00526fddf435423272cf10f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b5bb87687b19fbc48be9068db60da7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c87f4c40e50504adaface510404dbfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594fa9a4bce1ed5fd27e4cb55d63cf0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf8be368791da55817b64a14a89fcf24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
(2)已知平面上三点A、B、C的坐标分别是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de9c2a68bb128cdd92cdd103b0fedc03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
7 . 在某一个十字路口,每次亮绿灯的时长为
(
为时间单位:秒),那么每次绿灯亮时,在同一条直行道路上同方向能有多少辆汽车通过该十字路口?
该问题涉及车长、车距、车速,前方堵塞状况包括行人非机动车等因素.为了将问题简化,在路况车况驾驶状态等都良好的前提下,提出如下基本假设:
1.通过路口的车辆长度都相等;
2.等待通行时,前后相邻两辆车的车距都相等;
3.绿灯亮时,汽车都是沿同方向从静止状态匀加速启动,到达最高限速汽车开始匀速行驶;
4.离路口信号灯最近的第一辆车在绿灯亮后延迟
时间开始动起来.前一辆车启动后,下一辆车启动的延迟时间相等,在延迟时间内,车辆保持静止;
5.按照交通安全法规行驶,行车秩序良好,没有碰擦或堵塞等现象发生.
1.车长设为
,取
,车距设为
,取
,第一辆车离停车线距离为
;
2.加速度记作
,取
,汽车在匀加速运动
时段行驶路程
;
3.前后车启动延迟时间记为
,取
;
4.第
辆车启动延迟时间为
;
5.该十字路口限速
,换算为
;
6.第
辆车到达最高限速的时间为
取
.
设第
辆车在绿灯持续
时间内驶离停车线的距离为
.根据上述假设与数据,
,依次类推.请你解决下列问题:
(1)求
;(结果保留一位小数,单位:
)
(2)对于第
辆车,写出函数
的分段表达式;
(3)求在亮绿灯的
内,这一条直行道路上同方向能有多少辆汽车通过该十字路口.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6fd3aa935cffb2a4526ed28f47e4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2065bdd4392601a18d1ef1fc1fdb13ce.png)
该问题涉及车长、车距、车速,前方堵塞状况包括行人非机动车等因素.为了将问题简化,在路况车况驾驶状态等都良好的前提下,提出如下基本假设:
1.通过路口的车辆长度都相等;
2.等待通行时,前后相邻两辆车的车距都相等;
3.绿灯亮时,汽车都是沿同方向从静止状态匀加速启动,到达最高限速汽车开始匀速行驶;
4.离路口信号灯最近的第一辆车在绿灯亮后延迟
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9206b8d3214e21a3115c6bc9886d03.png)
5.按照交通安全法规行驶,行车秩序良好,没有碰擦或堵塞等现象发生.
1.车长设为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd09cd596379a9b81dd6cd74e123fd13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97599b586b7decae67a55cd008b9091.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/651a6747032c07c0ac12257e6fe8b254.png)
2.加速度记作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d90ff2ab2472b25fd95756e144f861d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a54eb2123d9eafa3b923287abe8b5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b2c53ba413678dc85ab3a6f0faf3c9e.png)
3.前后车启动延迟时间记为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb9206b8d3214e21a3115c6bc9886d03.png)
4.第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7ac4aec03431ef10172065c4a4fad20.png)
5.该十字路口限速
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d55f3eb3475ce28862370d286ebc4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e29784992adeb6014c71cbb551e0652.png)
6.第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b0b9925db981df603f7e863189fe3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e1ccd5ed2a995b0162013014396321f.png)
设第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a54eb2123d9eafa3b923287abe8b5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f48ae649161e580a4f96966f92abbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b865e8598fcbb953b40dbb143576640d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a3dc3e602639ccbf1a2e9c82a68e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e00f40396e914d1d9955bd7785f1f.png)
(2)对于第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f48ae649161e580a4f96966f92abbc.png)
(3)求在亮绿灯的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6fd3aa935cffb2a4526ed28f47e4ee.png)
您最近一年使用:0次
名校
8 . 某公司为监督检查下属的甲、乙两条生产线所生产产品的质量,分别从甲、乙两条生产线出库的产品中各随机抽取了100件产品,并对所抽取产品进行检验,检验后发现,甲生产线的合格品占八成、优等品占两成,乙生产线的合格品占九成、优等品占一成(合格品与优等品间无包含关系).
(1)用分层随机抽样的方法从样品的优等品中抽取6件产品,在这6件产品中随机抽取2件,记这2件产品中来自甲生产线的产品个数有
个,求
的分布列与数学期望;
(2)消费者对该公司产品的满意率为
,随机调研5位购买过该产品的消费者,记对该公司产品满意的人数有
人,求至少有3人满意的概率及
的数学期望与方差.
(1)用分层随机抽样的方法从样品的优等品中抽取6件产品,在这6件产品中随机抽取2件,记这2件产品中来自甲生产线的产品个数有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
(2)消费者对该公司产品的满意率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
您最近一年使用:0次
7日内更新
|
605次组卷
|
4卷引用: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)
(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)安徽省蒙城县第六中学2023-2024学年高二下学期阶段性考试数学试题(已下线)核心考点7 二项分布与超几何分布、正态分布 B提升卷 (高二期末考试必考的10大核心考点)安徽省滁州市九校2023-2024学年高二下学期4月期中联考数学试题
解题方法
9 . 在空间几何体
中,四边形
均为直角梯形,
,
.
,求直线
与平面
所成角的正弦值;
(2)如图2,设![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84450b3e28430072479ce38d273b115a.png)
(ⅰ)求证:平面
平面
;
(ⅱ)若二面角
的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3b9460251cd9fcf7906c912a6a74c1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115e3461ce95865ecf6d5bda10e24109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334df1bb0fcc75915955f4c355d1a6e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c54178d7baff3270dde770f64f59af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84450b3e28430072479ce38d273b115a.png)
(ⅰ)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(ⅱ)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7267f2934c256fd74e58cb62d685bba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4483fbccb86e51db927f5e7e08e0b044.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
您最近一年使用:0次
10 . 已知函数
.
(1)当
时,求
,并判断函数
零点的个数;
(2)当
时,
有三个零点
,记
,
,2,3.证明:①
;②
.
参考公式:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98dc59a1edc821f4cbd77ef908dff3c7.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c6fb3c74056a4b4ebbda9d2be78de34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80e6f74fdd5c57d4454f8e840563771a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722f025aeed67dbc2c16f60c3b06061d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b41b7154250380217e8dc70ff2a7591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4142405dce1c99e4c58474c00b2bd6e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65021f540ac58a37746758611f2fd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c69673c72476d11a283eb5e4d1f7a72.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26aa2c8a73ca9a054ed46e16eb5811e5.png)
您最近一年使用:0次