名校
解题方法
1 . 设点集
,从集合
中任取两个不同的点
,
,定义A,
两点间的距离
.
(1)求
中
的点对的个数;
(2)从集合
中任取两个不同的点A,
,用随机变量
表示他们之间的距离
,
①求
的分布列与期望;
②证明:当
足够大时,
.(注:当
足够大时,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3afcb129040d060714f94c0f8c48a04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c6d29b3010fc1dc9cb640ad41d5b97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8034add7b8011393a866a21479b62f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80ebc8c7e32c1b561a908a36cfa2cbb5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32efe4eff75508cb93e828c735dcb695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ffbdfab9dff3ff41ea474f06375032.png)
(2)从集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ddad3d9fdb5e9951b6a1c31f9a72a71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3bcb4828b16c8e845492f1a53ddd9a9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
②证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b59306134d26d7a35fd18bcdd401faeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8eed2b9b1f33517499ef35e044cd104.png)
您最近一年使用:0次
2 . 设
是面积为1的等腰直角三角形,
是斜边
的中点,点
在
所在的平面内,记
与
的面积分别为
,
,且
.当
,且
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4846f0f16f8651e0b98e70a6ce0c66.png)
_________ ;记
,则实数
的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779f538be94aff22b3eedabfc4c11be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e81f85f2c7f054f32a01e17f4aa8fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51336413ab117b448511bdcd4758e39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4846f0f16f8651e0b98e70a6ce0c66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2656215adf25c3a8a70073243020d62b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2024-01-25更新
|
942次组卷
|
5卷引用:2024届福建省厦门市一模考试数学试题
2024届福建省厦门市一模考试数学试题2024届河南省信阳市浉河区信阳高级中学二模数学试题广东省深圳市福田区红岭中学2024届高三高考适应性考试数学试卷(已下线)2.3.2 双曲线的性质(二十二大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)河南省漯河市高级中学2024届高三下学期3月检测数学试题(一)
名校
解题方法
3 . 已知椭圆
:
,
、
是
轴上不重合的两点,过点
作不与坐标轴垂直的直线
与椭圆
交于
、
两点,直线
、
分别与直线
交于
、
两点.
(1)若点
的坐标为
,点
的坐标为
,求点
的坐标;
(2)设
为线段
的中点,且
,求证:
;
(3)是否存在实数
,使得
为定值,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82e7d9f4f7ace849e09e9adcb786b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84bfec4efcc9f0e656d6864daaaef55d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/451fc6e4248b63e70595f23842f06c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df332f01628130c084fd46aaca0a4b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/28/b28305e6-3077-4f0b-a6b8-ba8b84c1c01f.png?resizew=150)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5265d99095b635f62c7915298ec0e963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30de16d50098ed030a31a2f27faf7424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79491c84be5a178b5d7c0c090627da03.png)
(3)是否存在实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02104738586aae1ca7975ec9967015a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解题方法
4 . 在数学中常有“数形结合”的思想,即找到代数式的几何意义,比如:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d138e8811f6d11d51735cb00fbacd4.png)
的几何意义便是抛物线
上的点P到点
和点
的距离之和,进而可以简化计算.现在,已知函数
的两个零点分别为
.
(1)当a=1时,证明:
;
(2)当a≥1时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d138e8811f6d11d51735cb00fbacd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8a12e1502b8e3a75a21efde37c1fceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1183df9f26985febdc844cda75ed4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e88ebfb5c0d6cce558b515be06404d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a07595bc923ffe166565c698fcada2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
(1)当a=1时,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/440277f1bffb48e5bf253600903534d3.png)
(2)当a≥1时,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0909854c2fde9caabe53c3cf636b3a1.png)
您最近一年使用:0次
名校
5 . 设点
是
:
上的动点,点
是直线
:
上的动点,记
,则
的最小值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d6f5adf13b4214666292dd64b947741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669e8dfb2b45e6f74d86408343a18fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af405a054bfe7fb7ce40e48d816467e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fc37ac7805d65dd49e2e54643e819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b39b055df71b3a01e406001ae3526f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135b08696706de37e1eab5f59697674c.png)
您最近一年使用:0次
2022-07-12更新
|
2284次组卷
|
4卷引用:2022届“云教金榜”N+1联考高三下学期5月冲刺测试文科数学试题
2022届“云教金榜”N+1联考高三下学期5月冲刺测试文科数学试题(已下线)专题27 直线与圆的综合应用-1上海市七宝中学2022-2023学年高二下学期开学摸底数学试题(已下线)压轴题02圆锥曲线压轴题17题型汇总-3
6 . 抛物线
的焦点为
,准线为
A为C上的一点,已知以
为圆心,
为半径的圆
交
于
两点,
的面积为
,求
的值及圆
的方程
(2)若直线
与抛物线C交于P,Q两点,且
,准线
与y轴交于点S,点S关于直线PQ的对称点为T,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94dd3389ea93571b83778bf5ed904d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a477603f3f88c3b48352b6130f9ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbdb21011ea821b91d539cb763aac649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982a5ebd53f287e742f726cf9fd8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7df99fe6438442a9453fc0c57fb703.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6956038a69bcefcf32b25917c0faf29.png)
您最近一年使用:0次
2022-06-06更新
|
5324次组卷
|
11卷引用:浙江省绍兴市春晖中学2022届高三下学期5月高考适应性考试数学试题
浙江省绍兴市春晖中学2022届高三下学期5月高考适应性考试数学试题湖北省九校教研协作体2023届高三上学期起点考试数学试题浙江省名校协作体2022-2023学年高三上学期适应性联合考试数学试题(已下线)9.5 三定问题及最值(精讲)(已下线)专题12 解析几何3山东省菏泽市2022-2023学年高二上学期期末数学试题(已下线)3.3.2 抛物线的几何性质(难点)-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)广东省汕头市潮阳区棉城中学2023-2024学年高二上学期数学竞赛试题(已下线)第7讲:圆锥曲线的模型【练】(已下线)黄金卷03浙江省杭州第二中学2023-2024学年高二下学期期中考试数学试题
2012·北京西城·一模
解题方法
7 . 如图,在直角坐标系
中,点
,
分别在射线
和射线上
运动,且
的面积为
,则
、
两点横坐标之积为______ ,
周长的最小值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.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/a0ae94fd75aad4aad175a469e01ceb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107ecaae347fbb48666623e0f8fda9dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.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/866b81a8384cce4f24867baca2e6820c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/b868d968-55cb-480f-9f60-faf010ae108a.png?resizew=150)
您最近一年使用:0次
2020-02-26更新
|
1754次组卷
|
3卷引用:2012届北京市西城区高三4月第一次模拟考试理科数学
(已下线)2012届北京市西城区高三4月第一次模拟考试理科数学湖南省岳阳市临湘市2018-2019学年高二下学期期末数学试题北京名校2023届高三一轮总复习 第7章 解析几何 7.1 直线的斜率与直线方程