1 . 过抛物线
的焦点
作直线
与抛物线交于
两点,且
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8269049ffbda5333600284ee5a12f674.png)
A.直线![]() |
B.直线![]() ![]() ![]() ![]() |
C.若![]() ![]() |
D.直线![]() ![]() ![]() |
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解题方法
2 . 如图所示.已知椭圆方程为
,F1、F2为左右焦点,下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/af38fe5b-b514-4a59-a04d-be2df7d84512.png?resizew=194)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347b68f42934c74e0d759a67613a1da9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/7/af38fe5b-b514-4a59-a04d-be2df7d84512.png?resizew=194)
A.P为椭圆上一点,线段PF1中点为Q,则![]() |
B.直线![]() ![]() ![]() ![]() |
C.若椭圆上存在一点M使![]() ![]() |
D.四边形 ![]() |
您最近一年使用:0次
2023-12-02更新
|
264次组卷
|
3卷引用:安徽省黄山市八校联盟2023-2024学年高二上学期期中考试数学试题
3 . 如图,抛物线
交
轴正半轴于点
,顶点为
,对称轴
交
轴于点
.过点
作射线
交
于点
在
轴上方),
交
于点
,
轴交
于点
,作直线
.
(1)求点
,
的坐标;
(2)当
为何值时,点
恰落在该抛物线上?
(3)当
时,
①求直线
的解析式,并判断点
是否落在该直线上;
②延长
交
于点
,取
中点
,连接
,
,四边形
,四边形
的面积分别记为
,
,
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab2fe78d4cfc053b67dc299929d7ca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134fc3507b06c25a6cdf06b7ae11f055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f501db7cdf0cb2e99604adac2e875ef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f0fe31dce5496ca3b6db70cf4cb623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d306d136acca4e114e0e8993edbc98ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/1073973a-45d0-4f51-b863-e609c6a6509b.png?resizew=178)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
①求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
②延长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a299d2b999568e80be8005565ba209a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4505508b3e36db64a207dcdaf8eb22dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4031d50318f8faa4b1eefd1dec796420.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1104e5fcd5680bb170941733453fb24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f87d89b3eb0c40885f5a6f011d9171b8.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/6899bf9cadae2ccdb14cbc87d4f280ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1627178de6edc574614a630f65775709.png)
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4 . 现有一种不断分裂的细胞
,每个时间周期
内分裂一次,一个
细胞每次分裂能生成一个或两个新的
细胞,每次分裂后原
细胞消失,设每次分裂成一个新
细胞的概率为
,分裂成两个新
细胞的概率为
;新细胞在下一个周期
内可以继续分裂,每个细胞间相互独立.设有一个初始的
细胞,在第一个周期
中开始分裂,其中
.
(1)设
结束后,
细胞的数量为
,求
的分布列和数学期望;
(2)设
结束后,
细胞数量为
的概率为
.
(i)求
;
(ii)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.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/4ae7fb954b47cb67fdde891c3b9d8295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1d4bfe34a8831230bc974d87d05e46.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10326b41ae31356fa3379160a2efc863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7bc9d7251a8274049f598111cd3514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e110c645197c4c2a4edf582df5ae71.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801ca8438513479df9afba162a7bfd74.png)
(ii)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b45d515488b2ddf9d60a439350f1bac.png)
您最近一年使用:0次
2023-06-03更新
|
2447次组卷
|
5卷引用:安徽省黄山市屯溪第一中学2024届高三第二次模拟考试数学试题(实验班用)
安徽省黄山市屯溪第一中学2024届高三第二次模拟考试数学试题(实验班用)山东省泰安肥城市2023届高考适应性训练数学试题(一)(已下线)模块三 专题7 随机变量及其分布列--拔高能力练(人教A版)(已下线)模块三 专题5 概率--大题分类练--拔高能力练(北师大2019版 高二)湖南省长沙市长郡中学2024届高三上学期月考数学试题(五)
解题方法
5 . 如图1,将一块边长为20的正方形纸片
剪去四个全等的等腰三角形
,
,再将剩下的部分沿虚线折成一个正四棱锥
,使
与
重合,
与
重合,
与
重合,
与
重合,点
重合于点
,如图2.则正四棱锥
体积的最大值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/949105d2-8f55-4199-b2e7-1451253766f5.png?resizew=356)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea3a3e86df5d770a59771f0efbdd166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/567559cd0f54fa3c6121fc1feb671a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cd237b82286370acdf8d0277c0be28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/522230546d4b802094e86ceb48c2ba38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/011ae6cb0cf49f6d3d19b485dc1cfc22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86163e76653de1f383788b741fb64a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29cd237b82286370acdf8d0277c0be28.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/949105d2-8f55-4199-b2e7-1451253766f5.png?resizew=356)
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 马戏团的表演场地是一个圆锥形棚,如图,
为棚顶,
是棚底地面的中心,
为棚底直径,
,
是棚底的内接正三角形,中间的支柱
米,从支柱上的
点向棚底周围拉了4根绳子
供动物攀爬表演,有一个节目表演的是猴子从
点沿着绳子
爬到
点,再沿着
爬到棚顶,然后从棚顶跳到
中的某一根绳子上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/cf507ce4-ee84-41cc-84f5-4fe0841b5f99.png?resizew=176)
(1)当
点取在距离
点
米处时,证明拉绳
所在直线和平面
垂直;
(2)经验表明当拉绳
所在直线和平面
所成角的正弦值最大时,节目的观赏性最佳,问此时应该把
点取在什么位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22538f4c49c5a0f1b1cf59773c218bd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d3c54b33e6ec883393f6630000446d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c7267e5313b9b00ef22c94a479fc34.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/cf507ce4-ee84-41cc-84f5-4fe0841b5f99.png?resizew=176)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed0325097927b92a6458bfbb0667b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)经验表明当拉绳
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2023-03-09更新
|
867次组卷
|
2卷引用:安徽省黄山市2022-2023学年高二上学期期末数学试题
22-23高三·河北·阶段练习
名校
解题方法
7 . 图为世界名画《蒙娜丽莎》.假设蒙娜丽莎微笑时的嘴唇可看作半径为
的圆
的一段圆弧
,且弧
所对的圆周角为
.设圆
的圆心
在点
与弧
中点的连线所在直线上.若存在圆
满足:弧
上存在四点满足过这四点作圆
的切线,这四条切线与圆
也相切,则弧
上的点与圆
上的点的最短距离的取值范围为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c48e8b4a3e2ef13de1ad88f8ed2b4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
8 . 在数学中,我们把仅有变量不同,而结构、形式相同的两个式子称为同构式,相应的方程称为同构方程,相应的不等式称为同构不等式.若关于
的方程
和关于
的方程
可化为同构方程.
(1)求
的值;
(2)已知函数
.若斜率为
的直线与曲线
相交于
,
两点,求证:.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c135f115a2ec4be616bbbfe8fc64516.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfbd117e0f5f8088933a94eb0d21b0fb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7818e883ddfce2714d4d81de56d1f789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a673c4b255a76a31893c53b4e8c3420b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6ff82ebdfad5e7de1c7487b0b817a7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab748045f620a425d340c3ee4b923986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a70898d64ac02d8800d02d8aab7653ff.png)
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2021-05-24更新
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6卷引用:安徽省黄山市屯溪第一中学2022届高三上学期10月月考理科数学试题