如图,在四棱锥
中,四边形
为正方形,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/6755b7cd-f6d2-4c4c-b090-40c1eadabff7.png?resizew=163)
(1)求证:
平面
;
(2)若
,
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b1472e121da0ae5550329cfda5f0a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/6755b7cd-f6d2-4c4c-b090-40c1eadabff7.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4934c4df6fd69381832ea14d144364cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a6f83567c788db941b7e39f1c3b518d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
21-22高三上·全国·阶段练习 查看更多[1]
(已下线)“超级全能生”2021-2022年高三全国卷地区(9月)联考试题(甲卷) 数学(文)试题
更新时间:2021-11-12 11:46:11
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在四棱锥P-ABCD中,底面ABCD是菱形,∠ABC=60°,PA⊥平面ABCD,点M、N分别为BC、PA中点,且PA=AB=2.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/f25956f8-9458-4108-b1c2-c231babea7ed.png?resizew=177)
(1)证明:BC⊥平面AMN;
(2)求三棱锥N-AMC的体积;
(3)在线段PD上是否存在一点E,使得MN∥平面ACE;若存在,求出PE的长;若不存在,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/f25956f8-9458-4108-b1c2-c231babea7ed.png?resizew=177)
(1)证明:BC⊥平面AMN;
(2)求三棱锥N-AMC的体积;
(3)在线段PD上是否存在一点E,使得MN∥平面ACE;若存在,求出PE的长;若不存在,说明理由.
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解答题-证明题
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适中
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解题方法
【推荐2】如图,在直三棱柱
中,
为
的中点,平面
与平面
的交线为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/83b59009-d904-4060-bf9e-1f6f099530a3.png?resizew=165)
(1)求证:
平面
;
(2)若
,
,
,
,直线
与平面
所成角为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.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/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/83b59009-d904-4060-bf9e-1f6f099530a3.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23976db53f05b3d5d791c4d736a7184d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99644f0e0881bc7bf383a88eb92c0949.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96c9eb310d9d90592d7ea635e3e06bb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99644f0e0881bc7bf383a88eb92c0949.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
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解答题-证明题
|
适中
(0.65)
【推荐3】如图,已知多面体
中,
平面
,
,三角形
是等边三角形,且
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/99536516-4f1a-42da-8b0d-813574fbef0a.png?resizew=160)
(Ⅰ)求证:
平面
;
(Ⅱ)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e20b970f3b0dc1c9a3de6eb09beead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb59a3752da728cfa77557dd14d0f737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/14/99536516-4f1a-42da-8b0d-813574fbef0a.png?resizew=160)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(Ⅱ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在三棱柱
中,点
在底面
内的射影是线段
的中点
,
.
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634694141157376/2635379745808384/STEM/666680ea52c340e8bf483fd8915d29d5.png?resizew=224)
(1)证明:
;
(2)若
,
是棱
上的动点(不包括端点),试问:三棱锥
的体积是否为定值?若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e3983eea98266c4600f82566d84993b.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634694141157376/2635379745808384/STEM/666680ea52c340e8bf483fd8915d29d5.png?resizew=224)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5f7b5e202c614123bfe0a66e68b026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ecac2dad4cffdd971fd23deacff3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca890295a51028f742758ed004dfa765.png)
您最近一年使用:0次
解答题-证明题
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适中
(0.65)
【推荐2】四棱锥
中,底面
是边长为
的正方形,
,
,且
,点
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/d7cdca10-3b90-4825-b853-e77f36f42db9.png?resizew=142)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0063f3f48e49f2970ec7f097567cef5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37002ada5d194d4d062fa3285d7d9824.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af550026606bd5e6b2fd22c731262093.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/d7cdca10-3b90-4825-b853-e77f36f42db9.png?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
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解答题-证明题
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适中
(0.65)
名校
【推荐1】如图,在四棱锥
中,底面
为正方形,
,
.
(Ⅰ)若
是
的中点,求证:
平面
;
(Ⅱ)若
,
,求三棱锥
的高.
![](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/adc969fe7eab49a6e9e2575386b7b3c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9425630dcfe5a824c44904d4f71e13.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/926584088b939200d88e64318f2d4e6c.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3249fdd1d369c89eae68e3d984d7f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858bde3ec0ed63e00b7f1e79d2917bc7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7819f75a18f910780ae37906f92a081e.png)
![](https://img.xkw.com/dksih/QBM/2018/4/4/1916745244942336/1917489451147264/STEM/b50118cc-08f0-4aa1-a403-1e85ccbc595b.png?resizew=248)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图,在三棱柱
中,
底面
,
,四边形
是正方形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/619d6a9b-6894-48fa-92f2-9759111be739.png?resizew=174)
(1)证明:
;
(2)若
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/822ba132ca9dd0d4a050659aef3c9b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/619d6a9b-6894-48fa-92f2-9759111be739.png?resizew=174)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e862713d078c4f06ec1f15ccd6f5a1f7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e4f0c1c9cca0555906d8a53e1a6803d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2f7554a52815bfa0f4d75221ba7397.png)
您最近一年使用:0次