名校
1 . 如图1,在边长为4的菱形ABCD中,∠DAB=60°,点
,
别是边BC,CD的中点,
,
.沿MN将
翻折到
的位置,连接PA、PB、PD,得到如图2所示的五棱锥P—ABMND.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/f64be2ec-3790-44d8-8a77-8b61f4d549c5.png?resizew=310)
(1)在翻折过程中是否总有平面PBD⊥平面PAG?证明你的结论;
(2)当四棱锥P—MNDB体积最大时,在线段PA上是否存在一点Q,使得平面QMN与平面PMN夹角的余弦值为
?若存在,试确定点Q的位置;若不存在,请说明理由.
![](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/960936ff4047762dde9f567036887cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e06b8bc2571146b241e6028a742e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12225a1a1eda07908309f8100cc34726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/f64be2ec-3790-44d8-8a77-8b61f4d549c5.png?resizew=310)
(1)在翻折过程中是否总有平面PBD⊥平面PAG?证明你的结论;
(2)当四棱锥P—MNDB体积最大时,在线段PA上是否存在一点Q,使得平面QMN与平面PMN夹角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83fb9ac8a18e78a4c56da79514b5ccb.png)
您最近一年使用:0次
2022-07-24更新
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2856次组卷
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9卷引用:黑龙江省哈尔滨市第六中学校2021-2022学年高一下学期期末数学试题
黑龙江省哈尔滨市第六中学校2021-2022学年高一下学期期末数学试题广东省汕头市金山中学2023届高三上学期第二次月考数学试题河北省石家庄市十五中2022-2023学年高二上学期第一次月考数学试题山西省山西大学附属中学校2022-2023学年高二上学期10月(第二次模块诊断测试)数学试题重庆市永川北山中学校2022-2023学年高二上学期第一次月考(10月)数学试题(已下线)广东省江门市棠下中学2022-2023学年高三上学期数学试题变式题17-22(已下线)模块四 专题6 立体几何安徽省合肥一六八中学2021-2022学年高二上学期第一次月考数学试题湖南省常德市汉寿县第一中学2023-2024学年高三上学期11月月考数学试题
名校
解题方法
2 . 正方体
中.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/11031758-d27d-4692-acff-e5b787b7952e.png?resizew=183)
(1)已知
,
,
分别为
,
中点.
①若过
的截面与平面
平行,求此截面的面积;
②若
,
分别是
,
上动点,且
,求
长度的最小值;
(2)若正方体各个顶点都在平面
的同侧,且A,
,
,
到平面
的距离分别为1,2,3,5,试求
与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/11031758-d27d-4692-acff-e5b787b7952e.png?resizew=183)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
①若过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b7f2b545660bc026db8dbaac8b527c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83f1f880e5ffbff036953acaca90c41.png)
(2)若正方体各个顶点都在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
2022-07-20更新
|
574次组卷
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2卷引用:黑龙江省哈尔滨市第三中学校2021-2022学年高一下学期期末考试数学试题
名校
3 . 四棱锥
平面
,底面
为直角梯形,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/e289126e-cb58-424d-8508-2a4fd15611da.png?resizew=196)
(1)求证:
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)
是棱
上的点,若二面角
的正弦值为
,确定点
的位置.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6751206a2b2b981643c184854295851b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cd03ac3694291568e4bffdbb63a8cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e415b9f4c4ab76d9cdc61418b953cb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/1/e289126e-cb58-424d-8508-2a4fd15611da.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55acf08a1fe8bea7a4822d8718dbc09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
名校
4 . 如图,在四棱柱
中,
,
,底面ABCD是菱形,
,平面
平面ABCD,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/14d211d0-f2fe-4b00-bd26-f99955624cd3.png?resizew=250)
(1)证明:
平面ABCD;
(2)若M是线段
的中点,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70c3527620adb4fdabefa3ac6201ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3185a3ae0e69ba7d6c72dd00101c69f8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/14d211d0-f2fe-4b00-bd26-f99955624cd3.png?resizew=250)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a67521824abc07e3755db95d8f19621.png)
(2)若M是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ddb9e732672e83605974d800efa788f.png)
您最近一年使用:0次
名校
5 . 如图,在四棱锥
中,底面ABCD为菱形,
,Q为AD的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/f89e61a0-ae35-4703-b673-b139e459d62a.png?resizew=224)
(1)点M在线段PC上,
,求证:
平面MQB;
(2)在(1)的条件下,若
,求直线PD和平面MQB所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/931bbffda5e872703c9947eccc47ede2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/26/f89e61a0-ae35-4703-b673-b139e459d62a.png?resizew=224)
(1)点M在线段PC上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc47768bee81ee0c6fbc41e3fdeb22cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954c584f9c868d235e0fc1debb14428d.png)
(2)在(1)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c327b3e91d8bea53255d9308a952a276.png)
您最近一年使用:0次
2022-07-20更新
|
3063次组卷
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6卷引用:黑龙江省大庆市大庆实验中学2021-2022学年高一下学期期末数学试题
黑龙江省大庆市大庆实验中学2021-2022学年高一下学期期末数学试题(已下线)第09讲 立体几何与空间向量 章节总结 (讲)-1湖北省襄阳市第五中学2022-2023学年高三上学期暑期返校数学试题(已下线)高二上学期期中测试卷(选择性必修第一册全部范围)-【同步题型讲义】2022-2023学年高二数学同步教学题型讲义(人教A版2019选择性必修第一册)江西师范大学附属中学2022-2023学年高二下学期3月月考数学试题江西省赣州市六校联盟2022-2023学年高二下学期5月联合测评数学试题
名校
解题方法
6 . 如图,在四棱锥
中,
,
,底面
是菱形,
是
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/76e3c7b0-ff0a-4ac7-b235-3c8f8d363bc7.png?resizew=265)
(1)证明:平面
平面
;
(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/0e5638a965808dbcfa7721f7d3ecf02b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3755b2bcf7516eedb26a27ad73657216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/76e3c7b0-ff0a-4ac7-b235-3c8f8d363bc7.png?resizew=265)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a44cd09d9ad46264de4620c60370d49d.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次
2022-07-20更新
|
987次组卷
|
2卷引用:黑龙江省大庆市大庆中学2021-2022学年高二下学期期末考试数学试题
解题方法
7 . 已知椭圆
:
(
)经过点
,离心率为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/0774c962-39a7-4911-8c5e-21813aa17f5c.png?resizew=199)
(1)求椭圆
的方程;
(2)如图所示,过椭圆
上的点
,(
)的直线
与
,
轴的交点分别为
和
,且
,过原点
的直线与
平行,且与椭圆
交于
、
两点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d5b478165f73e9b90820b107104b0f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/0774c962-39a7-4911-8c5e-21813aa17f5c.png?resizew=199)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)如图所示,过椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a04279d4a084ad186979839fb0cfcb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd4af623b87d5c707bb149ab9998db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9364703a6ca52693004abbfaaf6fd4b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
您最近一年使用:0次
名校
解题方法
8 . 如图,在四棱锥
中,底面
为等腰梯形,
,
,
面
,
,点
为线段
中点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/28/a4944444-e3b5-4ffc-a3e2-8e8701bdb51c.png?resizew=140)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
面
;
(2)求异面直线
与
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dceb5cc71fc50f20649f6b9535fd914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c83f8945042b9c8fb2fbdac9308d62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39c049bbf873a6af116712840484b98f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/28/a4944444-e3b5-4ffc-a3e2-8e8701bdb51c.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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2022-06-24更新
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1397次组卷
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5卷引用:黑龙江省双鸭山市第一中学2021-2022学年高二下学期期末数学试题
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9 . 已知椭圆M:
(a>b>0)的离心率为
,AB为过椭圆右焦点的一条弦,且AB长度的最小值为2.
(1)求椭圆M的方程;
(2)若直线l与椭圆M交于C,D两点,点
,记直线PC的斜率为
,直线PD的斜率为
,当
时,是否存在直线l恒过一定点?若存在,请求出这个定点;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
(1)求椭圆M的方程;
(2)若直线l与椭圆M交于C,D两点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56ab70e602f2e2e291df643ab209162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a745c2da749f30fcf58edf0821f7cb04.png)
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2022-06-23更新
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6卷引用:黑龙江省鹤岗市第一中学2021-2022学年高二下学期期末数学试题
黑龙江省鹤岗市第一中学2021-2022学年高二下学期期末数学试题黑龙江省牡丹江市第三高级中学2022-2023学年高三上学期第六次月考数学试题青海省海东市第一中学2022届高考模拟(二)数学(理)试题(已下线)专题24 圆锥曲线中的存在性、探索性问题 微点1 圆锥曲线中的存在性问题(已下线)第25讲 圆锥曲线直线圆过定点问题-【同步题型讲义】2022-2023学年高二数学同步教学题型讲义(人教A版2019选择性必修第一册)(已下线)专题16 圆锥曲线-备战2023年高考数学母题题源解密(全国通用)
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10 . 在平面直角坐标系xOy中,椭圆C:
的离心率为
,左顶点为A,上顶点为B,
.
(1)求椭圆C的标准方程;
(2)不过椭圆点A的直线l交椭圆C于M,N两点,记直线l,AM,AN的斜率分别为k,k1,k2,若
.证明:直线l过定点,并求出定点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/948261c41cc1509f023761d880c75582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d04d94b89c1e6ca3c3cad3e4f7884d37.png)
(1)求椭圆C的标准方程;
(2)不过椭圆点A的直线l交椭圆C于M,N两点,记直线l,AM,AN的斜率分别为k,k1,k2,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed06be37684e5999b3378a09c7706b48.png)
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2022-06-03更新
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2卷引用:黑龙江哈尔滨工业大学附属中学校 2021-2022学年高二下学期期末理科数学试题