名校
解题方法
1 . 如图,已知椭圆
的左、右顶点分别为
,
,其离心率为
,椭圆
上的点到焦点的最短距离为1.过平面上一点
作椭圆
的切线
,
,当直线
与
的斜率都存在时,它们的斜率之积是
,当其中一条切线的斜率不存在时,则另一条直线的斜率为0,记点
的轨迹为曲线
.直线
,
分别交椭圆
于点
,
.
的标准方程;
(2)求曲线
的方程;
(3)求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78fd95f89dec2d373fa57f02acd739f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
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名校
解题方法
2 . 已知直线
和椭圆
.
(1)证明:
与
恒有两个交点;
(2)若
为
与
的两个交点,过原点且垂直于
的直线交
于
两点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b648c913b1b66abb9cd526dd8a7b2ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0b0ae6048bf94ccd5a3b4a8aafd81e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ce9db8bf6dff7b5b1feb849f5532f22.png)
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解题方法
3 . 已知点
是抛物线
的焦点,
的两条切线交于点
是切点.
(1)若
,求直线
的方程;
(2)若点
在直线
上,记
的面积为
的面积为
,求
的最小值;
(3)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a51cfe6b1f93e8beab2a1391fa5b8a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c767183fcb90fd994f705fa0bebd33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bfbf105868ad7dca03b9663a01c3422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c74b2b7a4048782fecb0126119bb5dd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884d40a97fd767e95f34f3b91ab8d84c.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1e767d0df819ecd47359fee289efc3.png)
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711次组卷
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2卷引用:重庆市第一中学校2023-2024学年高二下学期5月月考数学试题
4 . 请解决以下两道关于圆锥曲线的题目.
(1)已知圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a463744f6f85de0ff99bc2e3073b9e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ac0e546bcbe8f61871a9fc7b54a397f.png)
,圆
过点
且与圆
外切. 设
点的轨迹为曲线
.
①已知曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51b7443710a39ea647519a847651881.png)
与曲线
无交点,求
的最大值(用
表示);
②若记①的
最大值为
,圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347761783913374a6db9f9308c475c7c.png)
和曲线
相交于
、
两点,曲线
与
轴交于
点,求四边形
的面积的最大值,并求出此时
的值. (参考公式:
,其中
,当且仅当
时取等号)
(2)如图,椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
的左右焦点分别为
、
,其上动点
到
的距离最大值和最小值之积为
,且椭圆
的离心率为
.
的标准方程;
②已知椭圆
外有一点
,过
点作椭圆
的两条切线,且两切线斜率之积为
.是否存在合适的
点,使得
?若存在,请写出
点的坐标;若不存在,请说明理由.
(1)已知圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a463744f6f85de0ff99bc2e3073b9e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ac0e546bcbe8f61871a9fc7b54a397f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135ca0a66c17732a1784067fe6242f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d41eebe0c6eeea2f26ac805ea0d495be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
①已知曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51b7443710a39ea647519a847651881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d40b719b78761f8c49ebe502258d9db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
②若记①的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67202feb9b75fb893e9fc70cc1059d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347761783913374a6db9f9308c475c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd8b64ef4c3a8c2382adb986d302c74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f76addd347535475e10663c4b7b2ea0.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e20f79147e482309d1469c6885fd9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c64203042269bcf6365d0374d6c1049.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a521891098b625f372ff648d110afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44acc0ee22dc4b7750e8be825e7c1355.png)
(2)如图,椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7216d1023a8be68e34375f51a51dda.png)
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
②已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db634c178cd7bffbd4cb886e3f2cca22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解题方法
5 . 已知点
为焦点在
轴上的等轴双曲线上的一点.
(1)求双曲线的方程;
(2)已知直线
且
交双曲线右支于
两点,直线
分别交该双曲线斜率为正的渐近线于
两点,设四边形
和三角形
的面积分别为
和
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f40d5459e1385ab7d829ea96ca0b946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)求双曲线的方程;
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108cab3ffbf5705366ad2f3af6bb9e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec8858389f4c3156a946ba8bf0d8a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f4248e8021130ab60365e3d2e9a694.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.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)
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解题方法
6 . 已知点
,直线
,动圆过点F且与直线l相切,动圆圆心轨迹为曲线
.
(1)求曲线
的方程;
(2)已知定点
,过点P的直线m交曲线C与M,N两点.
①若直线
与直线l交于点H,求
的最小值;
②在y轴上是否存在与点P不同的定点Q,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2347bec7975dab2b8bce2fd19b1237d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42502a5730e1930d77d7100d1e34707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c10f14aae6fb21e047ecb39cdf40c0.png)
①若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b0d26df529bbd8953f127102885f54e.png)
②在y轴上是否存在与点P不同的定点Q,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28390341f43e405f91454b05e2f406d1.png)
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7 . 已知双曲线
的右顶点为
是双曲线
上两点,过
作斜率为
的直线
,
与双曲线只有
点这一个交点.
(1)求双曲线
的方程;
(2)若
是以
为直角顶点的等腰直角三角形,求
的面积;
(3)已知点
和双曲线上两动点
,满足
,过点
作
于
点,证明:
点在一个定圆上,并求定圆的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5c2e64358e0ec7aa142c336d970306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05e7542516ded0ce4b169a851da1f08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a4ba61e0fe0cb463581292835301f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47f2874795e9df280e3e0bec171358e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a447cd7d35c87c29590a75468adcaf3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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解题方法
8 . 如图,经过边长为1的正方体的三个项点的平面截正方体得到一个正三角形,将这个截面上方部分去掉,得到一个七面体,则这个七面体内部能容纳的最大的球半径是______ .
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948次组卷
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6卷引用:江苏省启东中学2023-2024学年高二年级下学期数学第二次月考
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名校
解题方法
9 . 如图,在矩形ABCD中,
,
,M是AD的中点,将
沿着直线BM翻折得到
.记二面角
的平面角为
,当
的值在区间
范围内变化时,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46356d335bec7688dc90f33ac9213d4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9052adaffb2d28fd9a3cd737a9b4ef28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083479b94380e8d659eff92d10a1989d.png)
A.存在![]() ![]() |
B.存在![]() ![]() |
C.若四棱锥![]() ![]() ![]() |
D.若直线![]() ![]() ![]() |
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3卷引用:江苏省南京市南京师范大学附属中学2023-2024学年高二下学期期中考试数学试卷
10 . 如图,四面体
中,
.
(1)求证:平面
平面
;
(2)若
,
①若直线
与平面
所成角为30°,求
的值;
②若
平面
为垂足,直线
与平面
的交点为
.当三棱锥
体积最大时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6c03029467212c952b89696f45456d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/23/2f9a3c3f-41a9-40b4-a456-a8b33158146b.png?resizew=164)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06123e81c41198c76a3335757fac2c93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e156c3e4ffa35ed0ac6526c8d8753d.png)
①若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b17622ea6f6f5afd1ad817a557e5889d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d742e749b1140b21512408d555f14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7e4fa04825ac7d071968056322d88be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf4c26f3f4d96117f087400a0f32ece8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8be743a99c9d9c2775ced96ccf86d178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f0b8e4d79f6276b0ab054d887183a8.png)
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