如图,在四棱锥
中,底面
是平行四边形,
、
、
分别为
、
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/0a706d34-541a-45d2-877d-ed73d328a935.png?resizew=152)
(1)证明:平面
平面
;
(2)在线段
上是否存在一点
,使得
平面
?若存在,求出
的值;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/411b38a18046fea8e9fab1f9f9b80a5f.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/0a706d34-541a-45d2-877d-ed73d328a935.png?resizew=152)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b28a07491270be75a3697538bec706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1122194658d429a4c187d6fe4a1c6239.png)
20-21高一下·湖南·期中 查看更多[7]
湖南省三湘名校教育联盟2020-2021学年高一下学期期中数学试题安徽省六安市皖西中学2020-2021学年高二上学期期中文科数学试题湖北省黄石市有色第一中学2021-2022学年高二上学期期中数学试题(已下线)第11练 空间直线、平面的平行-2022年【暑假分层作业】高一数学(人教A版2019必修第二册)陕西省西安市蓝田县2021-2022学年高一上学期期末数学试题(已下线)专题08 空间直线与平面的平行问题(1)-期中期末考点大串讲(已下线)第五章 破解立体几何开放探究问题 专题一 立体几何存在性问题 微点3 立体几何存在性问题的解法综合训练【基础版】
更新时间:2021-07-10 11:29:16
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,直三棱柱
中,
,
,点M,N分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/2021/12/19/2875916852690944/2877361832304640/STEM/690ec511-745a-45e4-9913-24fb08fa8201.png?resizew=260)
(1)证明:
∥平面
;
(2)求异面直线
与
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab917cf28081f6a5e53430bf89cdd8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b46ef11527720df2204ed7fca148fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd5a323a81873962bbf8caa26e6500ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/2021/12/19/2875916852690944/2877361832304640/STEM/690ec511-745a-45e4-9913-24fb08fa8201.png?resizew=260)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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解答题-证明题
|
适中
(0.65)
名校
【推荐2】多面体
中,
,
,
是边长为2的等边三角形,四边形
是菱形,
,
分别是
的中点.
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d0a0c9a7b843fee5dd2f78703bb13b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/983a8d7745d1440cdbc7e6a65b25c3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9186e4574ffe28e673724fcb019db208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b586e4d914d4408724ebcb3e7d20ceac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824f43659734139984bbea0c2084541b.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9186e4574ffe28e673724fcb019db208.png)
![](https://img.xkw.com/dksih/QBM/2018/5/18/1948153721585664/1949343537643520/STEM/34b370b729ac41398bfe78a0e37576e4.png?resizew=216)
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解答题-证明题
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适中
(0.65)
解题方法
【推荐3】如图所示,在四棱锥E﹣ABCD中,平面ABCD⊥平面BCE,四边形ABCD为矩形,BC=CE,点F为CE的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/afb450e8-33a7-4d24-9280-84f7a681a0d6.png?resizew=131)
(1)证明:AE∥平面BDF;
(2)若点P为线段AE的中点,求证:BE⊥平面PCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/afb450e8-33a7-4d24-9280-84f7a681a0d6.png?resizew=131)
(1)证明:AE∥平面BDF;
(2)若点P为线段AE的中点,求证:BE⊥平面PCD.
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解答题-证明题
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适中
(0.65)
【推荐1】如图,正四棱锥S-ABCD的底面是边长为
正方形,O为底面对角线交点,侧棱长是底面边长的
倍,P为侧棱SD上的点.
.![](https://img.xkw.com/dksih/QBM/2011/12/7/1570560179462144/1570560184819712/STEM/60292b23160c46d296057206d9af6af4.png?resizew=215)
(Ⅰ)求证:AC⊥SD
(Ⅱ)若SD⊥平面PAC,
为
中点,求证:
∥平面PAC;
(Ⅲ)在(Ⅱ)的条件下,侧棱SC上是否存在一点E, 使得BE∥平面PAC.若存在,求SE:EC的值;若不存在,试说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
.
![](https://img.xkw.com/dksih/QBM/2011/12/7/1570560179462144/1570560184819712/STEM/60292b23160c46d296057206d9af6af4.png?resizew=215)
(Ⅰ)求证:AC⊥SD
(Ⅱ)若SD⊥平面PAC,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
(Ⅲ)在(Ⅱ)的条件下,侧棱SC上是否存在一点E, 使得BE∥平面PAC.若存在,求SE:EC的值;若不存在,试说明理由.
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【推荐2】如图所示,
平面
,点
在以
为直径的
上,
,
,点
为线段
的中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/abf6b001-e3c8-47b3-a6ec-6ba5d0c878fa.png?resizew=242)
(1)求证: 平面
平面
;
(2)求证: 平面
平面
.
![](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/162d2b5b1e55c95acfdeeac96ffd76df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60748993d43e143b211c1c38503a5b91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/abf6b001-e3c8-47b3-a6ec-6ba5d0c878fa.png?resizew=242)
(1)求证: 平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36cde51cc93dfd2c16f40ccc88107a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求证: 平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
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