解题方法
1 . 如图所示,
平面
,点
在以
为直径的
上,
,
,点M在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/71a02ec1-b487-44eb-bf66-d16dd8c4bebe.png?resizew=185)
(1)求证:平面
平面
;
(2)设二面角
的大小为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/590388ae64b699fe42b71de76ba3d28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a05fbe3ee7cb4a442651eeec516e209b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/27/71a02ec1-b487-44eb-bf66-d16dd8c4bebe.png?resizew=185)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
(2)设二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f67b2e13c73c708d0e0c6134fcdca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45b8b77522dfc890b99f0a86a690de94.png)
您最近一年使用:0次
名校
2 . 设命题
实数
满足
(
);命题
实数
满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e2f1a7cb753eafc3662bcc5a7005d9.png)
(1)若
且p∧q为真,求实数
的取值范围;
(2)若¬p是¬q的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebff6619f0334a3494d94c6cacf2f2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e2f1a7cb753eafc3662bcc5a7005d9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若¬p是¬q的充分不必要条件,求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2018-01-09更新
|
1350次组卷
|
11卷引用:黑龙江省齐齐哈尔市第八中学2018-2019学年高二上学期期末考试数学(文)试题
黑龙江省齐齐哈尔市第八中学2018-2019学年高二上学期期末考试数学(文)试题【全国百强校】河北省石家庄市师大附中田家炳中学2017-2018学年高二下学期期末考试数学试题河北省鸡泽县第一中学2017-2018学年高二下学期期末考试数学(理)试题河北省鸡泽县第一中学2017-2018学年高二下学期期末考试数学(文)试题【校级联考】湖北省宜昌市协作体2018-2019学年高二上学期期末考试数学(理)试题宁夏银川市第二中学2021-2022学年高二下学期期末考试数学(理)试题山东省单县第五中学2017-2018学年高二上学期第三次月考数学(理)试题甘肃省酒泉市敦煌中学2019届高三一诊数学(理)试卷黑龙江省海林市朝鲜族中学人教A版高中数学选修2-1单元测试:第一章常用逻辑用语【市级联考】湖南省娄底市2018-2019学年高二上学期期中考试数学(理)试题【校级联考】湖南省湘西自治州四校2018-2019学年高二上学期12月联考数学(理)试题
10-11高三上·山东聊城·阶段练习
3 . 给定两个命题:
:对任意实数
都有
恒成立;
:关于
的方程
有实数根;如果
与
中有且仅有一个为真命题,求实数
的取值范围.
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/4d9108569e1049a6a0dbdc7c0caa7ce2.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/35d6edb2b80f4d3da6fbbef2f554b769.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/38559f71105a459f888866417cd07d46.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/ef716ee67482464e8b7a8f27c8b5746e.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/35d6edb2b80f4d3da6fbbef2f554b769.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/f71d4d97c7d94572b2d852f2dd487972.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/1c0c20e72ede4d6f9181464115e7e52d.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/1c3ef5dfe2a3403daf64986238ce0384.png)
![](https://img.xkw.com/dksih/QBM/2011/9/9/1570307677011968/1570307682426880/STEM/486862230bd647e5ab5f41ec8c18f620.png)
您最近一年使用:0次
9-10高二下·江苏苏州·期末
4 . 如图,椭圆
的顶点为
焦点为![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/0fa9ff6f91514554b86b6df9f00d8d6b.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/5476967a67654314a1bef8611861d0a3.png)
S□
= 2S□![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/06ae4dfa351a4a39a695c18350f6e90f.png)
(1)求椭圆C的方程;
(2)设n 为过原点的直线,
是与n垂直相交于P点、与椭圆相交于A,B两点的直线,
,是否存在上述直线
使
成立?若存在,求出直线
的方程;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/3d7f1404c6a948b0a2f1f22be242244d.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/9ec19b3f13574a839521b64331294b48.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/0fa9ff6f91514554b86b6df9f00d8d6b.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/5476967a67654314a1bef8611861d0a3.png)
S□
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/dc07ad82a248445f9f8824c81557dcad.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/06ae4dfa351a4a39a695c18350f6e90f.png)
(1)求椭圆C的方程;
(2)设n 为过原点的直线,
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/a57bf0def0d24349b6305057ffe0a745.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/c6d2288538be4df0babd6e17db071e1f.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/49a4b15a800e4252aa01f8d4765f57b0.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/8dbf4fb88dd24a1eba92e128112f7a05.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/a57bf0def0d24349b6305057ffe0a745.png)
![](https://img.xkw.com/dksih/QBM/2011/2/12/1569984462028800/1569984467238912/STEM/7568045c6624473283f2e41cc38bb03a.png)
您最近一年使用:0次
5 . 如图,侧棱垂直于底面的三棱柱
中,
分别是
,
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/4af1d4dc-59bd-4c5c-94db-dafe2b484a03.png?resizew=151)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b55b97bd8f8350321040a0445c0c5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/4af1d4dc-59bd-4c5c-94db-dafe2b484a03.png?resizew=151)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547a4b438e2e6687c7cd55ea08bbaae2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557cba52f576f9e6d67616cbf7a85e8.png)
您最近一年使用:0次
2017-03-10更新
|
1057次组卷
|
3卷引用:黑龙江省齐齐哈尔市2020-2021学年高二上学期期末考试数学(理)试题
10-11高二上·黑龙江齐齐哈尔·期末
6 . (
已知椭圆的中心在坐标原点
,焦点在
轴上,椭圆的短轴端点和焦点所组成的四边形为正方形,短轴长为2.
(Ⅰ)求椭圆的方程;
(Ⅱ)设直线
过
且与椭圆相交于A,B两点,当P是AB的中点时,
求直线
的方程.
已知椭圆的中心在坐标原点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(Ⅰ)求椭圆的方程;
(Ⅱ)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85057c160951f97024461a5c6058c294.png)
求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次