1 . 已知抛物线
上的点
到焦点
的距离为
.
(1)求抛物线
的方程;
(2)点
在抛物线上,直线
与抛物线交于
两点(第一象限),过点
作
轴的垂线交于点
,直线
与直线
、
分别交于点
(
为坐标原点),且
,证明:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b01c57952e2e5a6cff630d4d77fefe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c18c261201283d56c071c1c8133dc20d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77397fbf8224ec0ae05cdf385839f70c.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da65eb3ef54e3787fde5820953af511c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be99fa94a1f3e4964fcc13a14fab9ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ad4d3b17d04091d6258426f7c42e80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2024-01-26更新
|
217次组卷
|
2卷引用:吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题
名校
解题方法
2 . 已知数列
中,
,
(
).
(1)求数列
的通项
;
(2)求数列
的前n项和
;
(3)若对于
,使得
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c4a4a9972b8fcc995c7e3f7da40a7d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
(2)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75b3c14179d05f8237f184dad3f87ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
(3)若对于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7703a7fb5662c11ed45755b2454fb039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2024-01-20更新
|
647次组卷
|
3卷引用:吉林省长春市朝阳区长春外国语学校2023-2024学年高二下学期开学考试数学试题
吉林省长春市朝阳区长春外国语学校2023-2024学年高二下学期开学考试数学试题(已下线)高二数学开学摸底考02(人教A版2019选一+选二全部,范围:空间向量与立体几何+直线与圆+圆锥曲线+数列+导数)-2023-2024学年高二数学下学期开学摸底考试卷天津市耀华中学2023-2024学年高二上学期期末学情调研数学试卷
名校
解题方法
3 . 已知
中,内角
所对的边分别为
.
(1)求角
的值;
(2)若点
满足
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c0d57cc5b8d05f33497f8c3e2a94dce.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66165a4813c742ee07a2b4a96887c458.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff29971ccc633d89832ffa9bd54afa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
您最近一年使用:0次
2024-01-11更新
|
1326次组卷
|
2卷引用:吉林省长春市朝阳区吉大附中实验学校2024届高三下学期开学考试数学试题
名校
解题方法
4 . 如图,设
中角A,B,C所对的边分别为a,b,c,D为
的中点,已知
,
的面积为
.
,求
的值;
(2)点E,F分别为边
,
上的动点,线段
交
于点
,且
,
(
为锐角),记
的面积为
,有
,求
的最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6cd1b78e09a35e20dff5d1265a85905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4f3da376bd01ef33579e6eecc6f047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cf2d39a965604b748811d9dff1cfdb8.png)
(2)点E,F分别为边
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce0c71a3a1d58e20a0b72ac1be907db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a50d3b893c9eb00791c230f99c5721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2947ca8e0cdbeb4aab80ce9e7b63ba98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cb20805c9db0cfd86e1297b8e06f505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
名校
解题方法
5 . 如图所示,在几何体
中,
平面
,点
在平面
的投影在线段
上
,
,
,
,
平面
.
平面
.
(2)若平面
与平面
的夹角的余弦值为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbc137cb348cbb7a70274cdd4f4ca8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2b5060e1311f27bcbde24dac84db8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c964573daaf5f1dcf8319030f90465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ed75e65e7374c38ffb1f75259a8beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6785c7c85a503531649f9c9b4cbfcf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190a6fdd4bb8d1b3bb239f188deb9d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2024-02-27更新
|
231次组卷
|
2卷引用:吉林省通化市梅河口市第五中学2023-2024学年高二下学期开学考试数学试题
名校
解题方法
6 . 在某次猜灯谜活动中,共有20道灯谜,每道灯谜由甲、乙两名同学轮流一人一次独立竞猜,甲同学猜对概率为0.6,乙同学猜对概率为0.4,假设猜对每道灯谜都是等可能的,试求:
(1)任选一道灯谜,甲、乙都没有猜对的概率;
(2)任选2道灯谜,恰好甲猜对了2次乙猜对1次的概率;
(3)记20道灯谜猜灯谜活动中,甲猜对的次数为X,求X的期望.
(1)任选一道灯谜,甲、乙都没有猜对的概率;
(2)任选2道灯谜,恰好甲猜对了2次乙猜对1次的概率;
(3)记20道灯谜猜灯谜活动中,甲猜对的次数为X,求X的期望.
您最近一年使用:0次
2024-02-17更新
|
1028次组卷
|
5卷引用:吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题
吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题理科数学-【名校面对面】2022-2023学年高三大联考(2月)试题(已下线)专题7.6 离散型随机变量及其分布大题专项训练【六大题型】-2023-2024学年高二数学举一反三系列(人教A版2019选择性必修第三册)(已下线)8.2 离散型随机变量及其分布列(4)(已下线)专题05 离散型随机变量的分布列常考点(8类题型)-备战2023-2024学年高二数学下学期期末真题分类汇编(江苏专用)
名校
解题方法
7 . 在政府工作报告指出,要加快建设创新型国家,把握世界新一轮科技革命和产业变革大势,深入实施创新驱动发展战略,不断增强经济创新力和竞争力
某手机生产企业积极响应政府号召,大力研发新产品,争创世界名牌
为了对研发的一批最新款手机进行合理定价,将该款手机按事先拟定的价格进行试销,得到一组销售数据
,如表所示:
(1)若变量
,
具有线性相关关系,求产品销量
百件
关于试销单价
千元
的线性回归方程
;
(2)用(1)中所求的线性回归方程得到与
对应的产品销量的估计值
当销售数据
对应的残差的绝对值
时,则将销售数据
称为一个“好数据”
现从
个销售数据中任取
个,求“好数据”至少有
个的概率.
参考数据:
参考公式:线性回归方程中
,
的估计值分别为
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6fa7819f87abc6f3929316621181d6.png)
单价 | ||||||
销量 |
![](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/1c61e103a765e2069a4615dd43ffd2b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285912b40e1dce8bfc029df88115c961.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db6103cb0f1d2bd6b19235d53ee7e98.png)
(2)用(1)中所求的线性回归方程得到与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ea8f47d8d8d9e1832d52b1c7425450.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7894df668a4338c8372539cfdb18f53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef046c85a536174bec951a53d9f60b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfc76683f75185314113df7a2b38f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef046c85a536174bec951a53d9f60b33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac6f0390adb5e467db8f8ac55b87e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc5505526d11946ca7d3a4421a9e08f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0032ca31e3cba58f973c6e75b907fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/645633a1baf36d0f1d01ecb57757c0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2dac6ea8715d871d15ba13883d2392.png)
您最近一年使用:0次
2024-02-04更新
|
673次组卷
|
6卷引用:吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题
吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题宁夏石嘴山市第三中学2023-2024学年高三上学期期中考试文科数学试卷(已下线)8.2 一元线性回归模型及其应用(分层练习,7大题型)-2023-2024学年高二数学同步精品课堂(人教A版2019选择性必修第三册)(已下线)【一题多变】 相关关系 回归分析(已下线)8.2 一元线性回归模型及其应用——随堂检测(已下线)8.2 一元线性回归模型及其应用(6大题型)精练-2023-2024学年高二数学题型分类归纳讲与练(人教A版2019选择性必修第三册)
22-23高二上·广东深圳·期末
名校
解题方法
8 . 已知
,其中
,
,
,
,
.且
展开式中仅有第5项的二项式系数最大.
(1)求
值及二项式系数最大项;
(2)求
的值(用数值作答).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcf238c503d4d7072c474818dbfc64b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/579c03588ab3fed5b3826597d52300c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a28ebcae373876112a8feabccdff63.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f635215f40d7ba8de36a8dbe7208cb.png)
您最近一年使用:0次
2024-02-03更新
|
818次组卷
|
7卷引用:吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题
吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题山东省东营市第一中学2023-2024学年高二下学期开学收心考试数学试题(已下线)广东省深圳市盐田高级中学2022-2023学年高二上学期期末考试数学试卷(已下线)第六章 计数原理章末综合达标卷-2023-2024学年新高二数学同步精讲精练宝典(人教A版2019选修第三册)(已下线)7.4 二项式定理 (3)(已下线)模块五 专题2 全真基础模拟2北京市中国人民大学附属中学2023-2024学年高二下学期统练3数学试题
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9 . 如图,四棱锥
中,底面
为平行四边形,
,
,
底面
.
(1)证明:
;
(2)若
,求平面
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3f4f259d60ade01bd9bf6632238e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/978df070-799e-4173-8ec6-d67f88a12985.png?resizew=160)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b07e317ffe7859e81b42ef4970e344a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4c15fb8fc3239d45bd4e7d8971f58e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745e0525a41fe2e2a7739c75a942290b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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2024-01-27更新
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2卷引用:吉林省长春市第二实验中学2023-2024学年高二下学期开学测试数学试题
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10 . 心理学家根据高中生心理发展规律,对高中生的学习行为进行研究,发现学生学习的接受能力依赖于老师引入概念和描述问题所用的时间.上课开始时,学生的兴趣激增,中间有一段时间学生的兴趣保持理想状态,随后学生的注意力开始分散.分析结果和实验表明,用
表示学生掌握和接受概念的能力(
的值越大,表示接受能力越强),x表示提出和讲授概念的时间(单位:
),满足以下关系:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7db30acba367d7013dd04be8d1445e.png)
(1)上课多少分钟后,学生的接受能力最强?能维持多少分钟?
(2)有一道数学难题,需要54的接受能力及
的讲授时间,老师能否及时在学生处于所需接受能力的状态下讲授完成这道难题?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76ce48eafd36547782174eb304d4a003.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f7db30acba367d7013dd04be8d1445e.png)
(1)上课多少分钟后,学生的接受能力最强?能维持多少分钟?
(2)有一道数学难题,需要54的接受能力及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1457a00c2b5977426358c8fcb8fcadf.png)
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2卷引用:吉林省四校2023-2024学年高一下学期期初联考数学试题