名校
1 . 在三棱锥
中,
平面
,
,点
在平面
内,且满足平面
平面
垂直于
.
时,求点
的轨迹长度;
(2)当二面角
的余弦值为
时,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8248c6a53aaa9419370f1d8adf2db72f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcf3ef95ed4461294d5a756af7592860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9989226d2596116d91a611de93d03dbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)当二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dde460d9f9825efb46557f38318e3f0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8964e388fc0da7f6dd81bb9bda44f2a5.png)
您最近一年使用:0次
2024-04-15更新
|
1439次组卷
|
5卷引用:重庆市开州中学2024届高三下学期全国卷模拟考试(一)数学试题
重庆市开州中学2024届高三下学期全国卷模拟考试(一)数学试题安徽省芜湖市安徽师范大学附属中学2024届高三第二次模拟考试数学试题安徽省天域全国名校协作体2024届高三下学期联考(二模)数学试题山东省菏泽市单县第一中学2024届高三下学期3月月考数学试题(已下线)安徽省天域全国名校协作体2024届高三下学期联考(二模)数学试题变式题16-19
名校
2 . 三阶行列式是解决复杂代数运算的算法,其运算法则如下:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c971b2ecdfce17d75d0290dd194baa3b.png)
.若
,则称
为空间向量
与
的叉乘,其中
,
,
为单位正交基底.以
为坐标原点,分别以
的方向为
轴、
轴、
轴的正方向建立空间直角坐标系,已知
是空间直角坐标系中异于
的不同两点.
(1)①若
,求
;
②证明:
.
(2)记
的面积为
,证明:
;
(3)问:
的几何意义表示以
为底面、
为高的三棱锥体积的多少倍?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c971b2ecdfce17d75d0290dd194baa3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b759f4d0af0d28b35bdd5648db70968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b44b6a86302386ebf96b784d02b039c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4e6bae1b67a0a1eeafdd1114a792df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f4837cd4b882c0380201dd437e7ae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2772831f709c3c7c9a334b9444e0504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/808173f5aafa97a38056d68247d68314.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4664eed9e1abab0ed6397c58d70e731.png)
![](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/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faea453a5148e6b281c75a0caa793452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00db2bada2cfc90c5213aca8af17df4c.png)
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f36900d061dee46d3f76344ac576ba1.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29aa828f2bd9a5e63ee58dcaa9d0d336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd55f2f03192e5f0d76bf1cdb51872f2.png)
(3)问:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0cfd110195cf5e453947d1648ef605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4124e7ab7a93ee45858b3a4d4ab3508b.png)
您最近一年使用:0次
2024-03-26更新
|
631次组卷
|
3卷引用:重庆市荣昌中学校2023-2024学年高一下学期4月期中考试数学试题
名校
解题方法
3 . 如图所示,在长方体
中,
,
在棱
上,且
.
,求平面
截长方体所得截面的面积
(2)若点
满足
,求平面
与
所成夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee52cea67e7d0a82c4b8ed1d9fcd55f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901c9e0d6c246c195b65100f3f622899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f74bd823200bb6dfb1c1721345f941ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5bc0580c6c53d00438fcf63bcbc5179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533677cab68214d89c7f2ee1a63650a1.png)
您最近一年使用:0次
2024-03-10更新
|
644次组卷
|
3卷引用:2024届高三下学期3月适应性考试数学试题(新高考金卷)
名校
解题方法
4 . 类似平面解析几何中的曲线与方程,在空间直角坐标系中,可以定义曲面(含平面)
的方程,若曲面
和三元方程
之间满足:①曲面
上任意一点的坐标均为三元方程
的解;②以三元方程
的任意解
为坐标的点均在曲面
上,则称曲面
的方程为
,方程
的曲面为
.已知曲面
的方程为
.
过曲面
上一点
,以
为方向向量,求证:直线
在曲面
上(即
上任意一点均在曲面
上);
(2)已知曲面
可视为平面
中某双曲线的一支绕
轴旋转一周所得的旋转面;同时,过曲面
上任意一点,有且仅有两条直线,使得它们均在曲面
上.设直线
在曲面
上,且过点
,求异面直线
与
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1277d620abbfa26fb39600e53e606d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1277d620abbfa26fb39600e53e606d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1277d620abbfa26fb39600e53e606d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa13f27f92b55bd7ecd9d750f98ae99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1277d620abbfa26fb39600e53e606d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1277d620abbfa26fb39600e53e606d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eedd047376c4cf1b9992cd8e4fe20df2.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/33d7a5b312e3d789a1070000315d63b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b4e60b50889c152c56fcf2d6ea35bc.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知曲面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d96461d2b3421aed548b754637ca8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.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/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ddad9072eb1393ce15ca0627c941b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
您最近一年使用:0次
名校
5 . 已知向量
.
(1)若
,求实数
;
(2)若向量
与
所成角为钝角,求实数
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14bffb4c83a054c9d0dcc1f85b7d9c2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a75525d27a7793d7cf698e16a7d809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49bc70bb27f9dc49c97fe6b5ccd018d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
名校
6 . 已知正方体
的棱长为2,E,F分别为棱
,
的中点,如图所示建立空间直角坐标系.写出向量
,
,
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae54940f33b8714da5fe3b7546f8b3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bbe8a8455153a398d940dadea54fcae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f427fe29be82b2d0be88be020f281f8c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/20/cec81449-e900-416e-af10-39df2400570b.png?resizew=170)
您最近一年使用:0次
2023-09-19更新
|
557次组卷
|
5卷引用:重庆市石柱回龙中学校2023-2024学年高二上学期9月质量检测数学试题
重庆市石柱回龙中学校2023-2024学年高二上学期9月质量检测数学试题甘肃省天水市秦安县第一中学2022-2023学年高二下学期期中数学试题(已下线)模块四 专题4 大题分类练 《空间向量与立体几何》基础夯实练(已下线)1.3 空间向量及其运算的坐标表示【第一练】(已下线)6.2 空间向量的坐标表示(1)
名校
解题方法
7 . 如图,已知四棱台
的上、下底面分别是边长为2和4的正方形,
,且
底面
,点P,Q分别在棱
、
上.
(1)若P是
的中点,证明:
;
(2)若
平面
,二面角
的余弦值为
,求四面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1880586c33da315e49ccb6e2d531c6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ecf072589c0f901d92f6bda111d841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/d2d8ba32-a1ad-43a5-a115-92136e4a2520.png?resizew=151)
(1)若P是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e5b64f90a420f867e826e8dbef2239.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9abe6e8d1f4f1e8bdc46ddbae0cd789.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e866091156cbd7beea724fbbdb25082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d86ab7c97cd8a0b15ba5efc1be94230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c7bce6eba5d07a34f24c5370c580ac7.png)
您最近一年使用:0次
2023-12-17更新
|
1056次组卷
|
20卷引用:重庆市南开中学2022届高三上学期12月月考数学试题
重庆市南开中学2022届高三上学期12月月考数学试题湖南省炎德英才2022届高三上学期12月联考数学试题湖南省名校联合体2021-2022学年高三上学期12月联考数学试题安徽省亳州市第一中学2021-2022学年高二上学期期末检测数学试题湖南师范大学附属中学2021-2022学年高三上学期12月联考数学试题(已下线)第03讲 空间向量的应用-【帮课堂】2021-2022学年高二数学同步精品讲义(苏教版2019选择性必修第二册)江苏省宿迁市沭阳如东中学2022-2023学年高三上学期9月阶段测试(三)数学试题(已下线)专题19 空间几何解答题(理科)-1江苏省南通市海门中学2022-2023学年高二下学期6月学情调研数学试题广东省博罗县2023-2024学年高二上学期期中数学试题广东省佛山市顺德区华侨中学2024届高三上学期12月月考数学试题四川省泸州市泸县第四中学2023-2024学年高二上学期12月月考数学试题湖南省长沙市湖南师大附中2024届高三上学期月考(四)数学试题(已下线)每日一题 第5题 面面夹角 运用向量(高二)山东省德州市第一中学2024届高三上学期1月月考数学试题湖北省恩施州巴东县第一高级中学2023-2024学年高二上学期末数学试题(已下线)专题13 空间向量的应用10种常见考法归类(2)四川省德阳市2024届高三下学期质量监测考试(二)数学(理科)试卷(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1(已下线)黄金卷02
名校
8 . 已知向量
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165585d14f3a8b6dd0c27daa34871908.png)
(1)求
与
的夹角;
(2)若
与
垂直,求实数t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33a14fbd5f8927be3b05fa6d8d7bbeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/165585d14f3a8b6dd0c27daa34871908.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10fe20979b51305571815087d8531f0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ffa3e1ce447d158f6084a66841307a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd828e6857e7d796cf4003c950305a5c.png)
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2023-02-10更新
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1298次组卷
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10卷引用:重庆市广益中学校2023-2024学年高二上学期10月月考数学试题
重庆市广益中学校2023-2024学年高二上学期10月月考数学试题山东省东营市2022-2023学年高二上学期期末考试数学试题江苏省淮安市马坝高级中学2022-2023学年高二下学期期中数学试题(已下线)模块三 专题3 空间向量及的坐标与空间直角坐标系 A基础卷(已下线)模块三 专题3 空间向量及的坐标与空间直角坐标系 A基础卷(人教B)宁夏银川市贺兰县第一中学2023-2024学年高二上学期第一阶段考试数学试题广东省东莞市第七高级中学2023-2024学年高二上学期10月月考数学试题湖南省长沙市德成学校2023-2024学年高二上学期期中数学试题安徽省六安市舒城县晓天中学2023-2024学年高二上学期第一次月考数学试题陕西省西安市鄠邑区第二中学2023-2024学年高二上学期第一次月考数学试题
名校
解题方法
9 . 如图,直三棱柱
中,底面
为等腰直角三角形,
是侧棱
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/f587e20d-fdf1-49b0-a194-fa074873f9ff.png?resizew=148)
(1)若
,求
的值;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d72e11f922148c1b1f1328976d80fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/24/f587e20d-fdf1-49b0-a194-fa074873f9ff.png?resizew=148)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88517eaaa7c6f423f565f938404105a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbc47a3dbd47d701dddcf17707549b85.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b810bf15975ccb16c38034b41bb46b0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
您最近一年使用:0次
解题方法
10 . 如图,在四棱锥
中,底面
是矩形,
平面
,
,
,
是
的中点,
是线段
上靠近
的三等分点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/116b2fc8-a58c-4d00-b62f-e4cd7fabbb5f.png?resizew=164)
(1)证明:
;
(2)求直线
与平面
所成角的正弦值.
![](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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a148e1cc59be85f85f41cafabeae11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e2a44d05b1d387150c4b359e021ffc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/116b2fc8-a58c-4d00-b62f-e4cd7fabbb5f.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6977bef1990627007a0412bdcfead18.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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