2010·广东汕头·一模
名校
解题方法
1 . 如图,四棱锥
的底面是边长为1的正方形,侧棱
底面
,且
,E是侧棱
上的动点.
的体积;
(2)如果E是
的中点,求证:
平面
;
(3)是否不论点E在侧棱
的任何位置,都有
?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)如果E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb178784aa857d4d4683e650273f054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(3)是否不论点E在侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/509d8dd6031dc0ef92075877e53fe201.png)
您最近一年使用:0次
2024-01-04更新
|
597次组卷
|
5卷引用:2017届北京市海淀区高三3月适应性考试(零模)文科数学试卷
2017届北京市海淀区高三3月适应性考试(零模)文科数学试卷(已下线)汕头市2009-2010学年度第二学期高三级数学综合测练题(理四)广东省2024年1月高中合格性学业水平考试模拟测试数学试题(三)(已下线)第13讲 8.6.2直线与平面垂直的性质定理 (第2课时)-【帮课堂】(人教A版2019必修第二册)陕西省西安市西安中学2023-2024学年高二学考仿真考试数学试题
名校
解题方法
2 . 如图,直四棱柱
中,底面
是边长为1的正方形,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/0daaa5d5-1d2e-483c-b1b8-d28103505dee.png?resizew=142)
(1)求证:
;
(2)从条件①、条件②、条件③这三个条件中选择两个作为已知,使得
平面
,并给出证明.
条件①:
为
的中点;
条件②:
平面
;
条件③:
.
(3)若
为
的中点,且点
到平面
的距离为1,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/0daaa5d5-1d2e-483c-b1b8-d28103505dee.png?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af20277067fdd1bf5b03cea567c0a84.png)
(2)从条件①、条件②、条件③这三个条件中选择两个作为已知,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b90810b206fa24f92d84504169e02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7542b49ab149f2be8ba6b48392bef1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
条件③:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a948b9a017c589727827d944ef1224c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81bf7a859123936a07193592e089340a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
您最近一年使用:0次
2023-11-14更新
|
233次组卷
|
2卷引用:北京市西城区北京师范大学附属实验中学2023-2024学年高二上学期期中考试数学试题
解题方法
3 . 如图,在四棱柱
中,底面是边长为1的正方形,侧棱
平面
,
,
是
的中点.
平面
;
(2)证明:
;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7542b49ab149f2be8ba6b48392bef1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bdef2e7a7929ad6190302ab44c46c0.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a0e00113872f921116b6c0c3177d0f.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e01f2a628e0b2bfbe88ac2714fdb71.png)
您最近一年使用:0次
2023-08-05更新
|
1131次组卷
|
5卷引用:北京市密云区2022-2023学年高一下学期期末数学试题
北京市密云区2022-2023学年高一下学期期末数学试题【北京专用】专题12立体几何与空间向量(第一部分)-高一下学期名校期末好题汇编湖北省恩施州鄂西南三校联盟考试2023-2024学年高二上学期9月月考数学试题(已下线)专题08立体几何期末14种常考题型归类(1)-期末真题分类汇编(人教B版2019必修第四册)(已下线)专题06 空间中点线面的位置关系6种常考题型归类(1)-期期末真题分类汇编(北京专用)
名校
解题方法
4 . 已知三棱锥
中,侧棱和底面边长均为6,H,G分别是AD,CD的中点,E,F分别是边AB,BC上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/60bfee69-5fa6-417c-a506-aa0e6e56a485.png?resizew=173)
(1)求证:E,F,G,H四点共面;
(2)设直线EH与FG相交于一点P,证明:点P一定在直线BD上;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65817cfd7cbcea8e49033f93cb8e8cfe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/18/60bfee69-5fa6-417c-a506-aa0e6e56a485.png?resizew=173)
(1)求证:E,F,G,H四点共面;
(2)设直线EH与FG相交于一点P,证明:点P一定在直线BD上;
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
您最近一年使用:0次
21-22高一下·北京·期末
解题方法
5 . 如图, 在三棱锥
中,已知
是正三角形,
平面
,
,
为
的中点,
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/ab06d698-66d5-46fe-a2e4-642d5fabaf5e.png?resizew=212)
(1)求三棱锥
的体积;
(2)求证:
平面
;
(3)若
为
中点, 是否存在
在棱
上,
,且
平面
? 若存在,求
的值并说明理由;若不存在,给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d150134e5018f74fc4e8a016ced5f11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/457eb716c608c6b4fb6e91c8fc2ed163.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/ab06d698-66d5-46fe-a2e4-642d5fabaf5e.png?resizew=212)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18da88f27cc36dbf1d01bcea7341bc37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf5909a2b109d048bd7c7a0377a769f.png)
您最近一年使用:0次
解题方法
6 . 如图,在四棱锥
中,底面ABCD是菱形,
,
平面ABCD,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/7627c04d-579e-40df-acf9-e5b87c69024c.png?resizew=149)
(1)求证:直线
平面PNC;
(2)在AB上是否存在一点E,使
平面PDE,若存在,确定E的位置,并证明,若不存在,说明理由;
(3)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b366eb3c3c2c1e7be9c0d52d770ee1f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8676b624f105072a3185911b25c912dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4f47cccdb7195f15858fcfdf644214.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/7627c04d-579e-40df-acf9-e5b87c69024c.png?resizew=149)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
(2)在AB上是否存在一点E,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(3)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4a5736e00f444d83c295fbeeb762c2.png)
您最近一年使用:0次
7 . 在四棱锥
中,底面
是边长为6的菱形,且
,
,
是棱
上的一动点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/c284e22b-6370-45a8-bfdc-7d251c427de9.png?resizew=191)
(1)求此三棱锥
的体积;
(2)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c92c97edb717461e4c9431ec9dcbe4.png)
(3)若
,侧面
内是否存在过点
的一条直线,使得直线上任一点
都有
平面
,若存在,给出证明,若不存在,请明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b2d907f61eca009db37f56f7703e808.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb7fae3337c793742989865aaeec6bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e84fa1225cd44c8d7dbd2de8706e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/365822bd3945e6a3e871ca979c84cc12.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/31/c284e22b-6370-45a8-bfdc-7d251c427de9.png?resizew=191)
(1)求此三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3120f88556157acd92fd64db1f853cc.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9c92c97edb717461e4c9431ec9dcbe4.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e8496e60bdb90f9de213a9ea39bc79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3520ee9cc97a075e889e1625dba1157c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/400f3d1f13c777161281a00e35970fa8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78d0399ee96906cb1ab244c06ab81362.png)
您最近一年使用:0次
2019-04-21更新
|
580次组卷
|
2卷引用:【区级联考】北京市门头沟区2019届高三年级3月综合练习数学试题(文)
8 . 如图,在四棱锥
中,
,底面
为平行四边形,
平面
.
![](https://img.xkw.com/dksih/QBM/2018/3/29/1912173732118528/1912683238678528/STEM/ea6a7864131049a39c5fd6644cca9d4b.png?resizew=193)
(
)求证:
平面
;
(
)若
,
,
,求三棱锥
的体积;
(
)设平面
平面
直线
,试判断
与
的位置关系,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65f64a9e1e5fb025d9c3e721150ebc27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec346cba41b378fcd97f1607835e259a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689c065652544780be8b33ae92cbb6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2018/3/29/1912173732118528/1912683238678528/STEM/ea6a7864131049a39c5fd6644cca9d4b.png?resizew=193)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb01d2b57580731c8b807ac8cffc8ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de927f7e512ea6302e38ef1b453e58c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ffc3552dd835a9ee6022bb11397a1bd.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64899adb2cc8913ed7d511eade821422.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0342f7bc94dcc0576863e4803413b134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2018-03-29更新
|
458次组卷
|
2卷引用:北京顺义牛栏山一中2017-2018学年高二上期中数学真题卷
9 . 如图,等腰梯形
中,
,
于点
,
,且
.沿
把
折起到
的位置,使
.
(
)求证:
平面
.
(
)求三棱柱
的体积.
(
)线段
上是否存在点
,使得
平面
.若存在,指出点
的位置并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a59a7d30b877db63279f0b44184da40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd44a2544888b6bef38bb9d51230c9e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a45024b1f1c50249cc194e8689ec01cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151020b65382d4d26b06453ca77d9442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef328d61bcf3cece520c35a2ce449ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2de47e6e8128d7aeb2f1877920dc9ff.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4cc38f853822c6949c9b959b01cdac.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb7eb9cc38b22a3ac9442e84d47b769.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca15691dfea154b932004966f2fbca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2061b9ab3862d9c36d32c4ffef91145a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44043884c1c5f80bfb013d9ddb48e277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2018/3/29/1912159129468928/1912657314963456/STEM/d254b12ca9ea4ff6961ee20ba7dddeef.png?resizew=534)
您最近一年使用:0次
名校
解题方法
10 . 如图,在四棱锥
中,
为正三角形,平面
平面
,
//
,
,
.
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220515209068544/2220763683184640/STEM/0ad9b1c0afd04d89bce4301d90237f4b.png?resizew=118)
(1)求证:平面
平面
.
(2)求三棱锥
的体积.
(3)在棱
上是否存在点
,使得
//平面
?若存在,请确定点
的位置,并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43dfede0d7e17c2ad89ab51349e6bf0.png)
![](https://img.xkw.com/dksih/QBM/2019/6/7/2220515209068544/2220763683184640/STEM/0ad9b1c0afd04d89bce4301d90237f4b.png?resizew=118)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0213c5787a5a6b38d11bceca5567f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
您最近一年使用:0次
2017-08-07更新
|
1421次组卷
|
5卷引用:北京市昌平区2017届高三第二次统一练习数学(文科)试题