1 . 已知点F为抛物线
的焦点,第一象限的点
在该抛物线上,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f83a841ffc534468a09b824bb5b694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d609cb7f8b4d79e8b65c0b8a0672d240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
您最近一年使用:0次
解题方法
2 . 已知
,
为双曲线C:
的左、右焦点,
,过
斜率存在的直线交C的右支于A,B两点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/0bff4a53-21c8-423f-8f7b-00853b335cc4.png?resizew=161)
(1)求C的方程;
(2)点A关于x轴对称点为D,直线BD交x轴于点E,记
,
的面积分别为
,
.求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177ae60ade0b7ac20e7bdc40eaa1ef5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d96389b282883a447201e8e522e009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e24141f9423ade72a08bc84e8ac09034.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/0bff4a53-21c8-423f-8f7b-00853b335cc4.png?resizew=161)
(1)求C的方程;
(2)点A关于x轴对称点为D,直线BD交x轴于点E,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b386553809980f819760503b3789b8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223501e86aa1b3d6e7b9d5cfa0112e33.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/235f0a6fb218d28383e6f27f2df1f50f.png)
您最近一年使用:0次
3 . 如图,在几何体
中,底面
为菱形,
,
,
,四边形
为矩形,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/3dd43451-c25d-472f-8212-8affd51d445b.png?resizew=173)
(1)证明:
平面
;
(2)求平面
与平面
的夹角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5cf4c6f6c6ca335388756214806ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23f01af749100e1888bba06268843db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e4280be91682e5d8a0d0704190319bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1b6711e6dd48be6cf8fa52926924d21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/3dd43451-c25d-472f-8212-8affd51d445b.png?resizew=173)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6261790c66cc71ee3898afabad0c09f4.png)
您最近一年使用:0次
解题方法
4 . 据文化和旅游部数据中心的测算,今年中秋、国庆假期
天,全国范围内旅游出游人次高达
亿人次,同比增长了惊人的
.国内出行人次增幅明显,为疫后
年来最好成绩.从
个
A景区中随机抽取
个,统计它们在“大黄金周”的旅游收入(单位:千万),整理得到下图.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/8d087c2d-f0c8-4aae-8700-dbd32a4280f4.png?resizew=240)
(1)根据该频率分布直方图计算
的值,并求这
个
A景区旅游收入的中位数;
(2)在
,
中按分层抽样的方法抽取
个
A景景区,再从这
个
A景区中随机抽取
个,求抽出
个中至少有
个收入在
中的概率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8e272015e72fa12fd325690b33e1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e31bdeaea4275cbe7d850fffa58feaba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a7d7c5feb5e0afc60913788c2e832c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/8d087c2d-f0c8-4aae-8700-dbd32a4280f4.png?resizew=240)
(1)根据该频率分布直方图计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b3779b4ea5477aebfe85113b0de1d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e937200afe1e350b12f112b20c3fcc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6533c2418a8c200118963832b11ba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6533c2418a8c200118963832b11ba6.png)
您最近一年使用:0次
解题方法
5 . 如图,在正方体中
中.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/63ee950c-ce81-422c-8cbf-0fb8c81de42c.png?resizew=169)
(1)证明:
平面
;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/4/63ee950c-ce81-422c-8cbf-0fb8c81de42c.png?resizew=169)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5830646a912c3a916beac4f88c116b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b78c047642924fe864028c81b1f49d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679748eab882a6be0fefd2cc300349a4.png)
您最近一年使用:0次
6 . 点
,
分别为椭圆C:
的左、右焦点,点A为C的右顶点,点P为C上第一象限内的动点,
,
分别为
,
内切圆半径.当
时,点P的坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cae00bdc6f8b564b6b15b32572c848b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2858005b9ae89ae080d83dcc13cf8e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3e95410f3b4fcb0cba425b521d1f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bf99c54d7eee25121966f6b121b80d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3422ad692e1b4c9c2f77fe705c4437b.png)
您最近一年使用:0次
解题方法
7 . 已知
,
是椭圆C:
的左、右焦点,上顶点为
,直线l:
与C交于点M,N,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e78f1a9cc4dedc05c175ab99b288b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952ce807cb90fe0025990797f5b12b59.png)
A.直线l恒过点![]() | B.当直线![]() ![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
8 . 传说古希腊毕达哥拉斯学派的数学家用沙粒和小石子来研究数.他们根据沙粒或小石子所排列的形状把数分成许多类,如图中的1,3,6,10称为三角数,则下列各数中是三角数的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/36dcfb7c-d10d-450c-a406-fb77f02f3b3b.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/2/36dcfb7c-d10d-450c-a406-fb77f02f3b3b.png?resizew=168)
A.20 | B.21 | C.22 | D.23 |
您最近一年使用:0次
9 . 下列函数中,若曲线
的图象如图所示,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afb80007983e5b99dcdeebf87d18ff4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/1/bcbcd453-2157-42ea-b625-6f5947efe6bc.png?resizew=165)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
10 . (1)已知
是第一象限角,
,求
,
的值;
(2)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15eceb32d6e9d10d28bb5a5e94bbf0f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef966cdd137b3b10e290201b4d17542e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982098b067fc4664d3ddafe270e2122a.png)
您最近一年使用:0次