1 . 如图所示,四棱锥
中,
菱形
所在的平面,
,点
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/99cfd6fc-4228-415a-aedd-25704a5ca33c.png?resizew=165)
(1)求证:平面
平面
;
(2)当
时,求多面体
的体积.
![](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/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/99cfd6fc-4228-415a-aedd-25704a5ca33c.png?resizew=165)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9b5d2943803894bc5d204e75e2d172b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd06964bc180eeb26209b77a69ab763e.png)
您最近一年使用:0次
2021-07-03更新
|
551次组卷
|
4卷引用:四川省乐山市十校2021-2022学年高二上学期期中考试数学(文)试题
名校
解题方法
2 . 如图,在四棱锥
中,底面
为正方形,且
底面
.
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755682196815872/2756283809243136/STEM/d5539b92-dcda-42c7-8090-ad72330dd1a8.png?resizew=235)
(1)求证:平面
平面
;
(2)若
为棱
的中点,在棱
上求一点F,使
平面
.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755682196815872/2756283809243136/STEM/d5539b92-dcda-42c7-8090-ad72330dd1a8.png?resizew=235)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
您最近一年使用:0次
2021-07-03更新
|
2297次组卷
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4卷引用:四川省乐山沫若中学2022-2023学年高二上学期第二次月考(期中考试)数学(文)试题
四川省乐山沫若中学2022-2023学年高二上学期第二次月考(期中考试)数学(文)试题全国2021届高三高考数学(文)信息试题(一)(已下线)7.2 空间几何中的垂直(精讲)-【一隅三反】2022年高考数学一轮复习(新高考地区专用)广东省梅州市大埔县田家炳实验中学2023届高三上学期第一次月考(8月)数学试题
名校
解题方法
3 . 如图,在正三棱柱
中,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833275760254976/2833296692150272/STEM/7d495800-737c-4773-9ec9-9e6fd1874217.png?resizew=250)
(1)证明:
平面
;
(2)已知
,
,求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2021/10/20/2833275760254976/2833296692150272/STEM/7d495800-737c-4773-9ec9-9e6fd1874217.png?resizew=250)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd597851c0db4e4de4769e10e09383b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e862713d078c4f06ec1f15ccd6f5a1f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d72d3b73315c93ed0cd16fa023677152.png)
您最近一年使用:0次
2021-10-20更新
|
477次组卷
|
2卷引用:四川省乐山第一中学校2021-2022学年高三上学期10月月考文科数学试题
名校
解题方法
4 . 如图:在多面体ABCDE中,
平面ACD,
平面ACD,
,
,F是CD的中点.
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648673668775936/2649267070418944/STEM/9187e149-816b-43df-8f59-90b8a9b7e51f.png)
(1)求证:
平面
;
(2)求证:平面
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/306bf5e379ea513d74ee94b6fdd82ae3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b922c7fc50a56933a6cb9d80b1e7bb6c.png)
![](https://img.xkw.com/dksih/QBM/2021/2/1/2648673668775936/2649267070418944/STEM/9187e149-816b-43df-8f59-90b8a9b7e51f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d46554105150391e671609fc6348a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
您最近一年使用:0次
2021-02-02更新
|
460次组卷
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3卷引用:四川省乐山沫若中学2020-2021学年高二下学期入学考试数学(文科)试题
名校
解题方法
5 . 设函数
(
,
为实数),
.
(1)若
,且对任意实数
均有
成立,求
表达式;
(2)在(1)的条件下,当
时,
是单调函数,求
的取值范围
(3)设
,
且
,
且
为奇函数,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de122801dfb31da6b933c90f3b98087f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d5d0b0af83e25d925687063047cb27c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a431537df789febf4bc45e3dc23cefaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
(2)在(1)的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24aa16b780156e18f12baa2b8ee0f9a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ce93b9f0ea8d7e3a5e4a4f2fcacf45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3838d126e7480e3e0827999f3cf9f771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1218eda19f74a1ed50ab106265c6621f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c75d9b18ccb3f9743b7c2dbe1e8d8c73.png)
您最近一年使用:0次
解题方法
6 . 如图,已知在三棱锥P﹣ABC中,PA⊥平面ABC,E,F,G分别为AC,PA,PB的中点,且AC=2BE.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/ce51e7d0-0724-4812-9a93-164fba8fca18.png?resizew=260)
(1)求证:PB⊥BC;
(2)设平面EFG与BC交于点H,求证:H为BC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/ce51e7d0-0724-4812-9a93-164fba8fca18.png?resizew=260)
(1)求证:PB⊥BC;
(2)设平面EFG与BC交于点H,求证:H为BC的中点.
您最近一年使用:0次
2021-06-12更新
|
231次组卷
|
4卷引用:四川省乐山市2022-2023学年高三上学期期末考试数学模拟试题
四川省乐山市2022-2023学年高三上学期期末考试数学模拟试题2020届江苏省百校高三下学期第四次联考数学试题(已下线)13.2 基本图形位置关系-2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)/13.2 基本图形位置关系-2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)陕西省西安市2022届高三下学期第二次质量检测文科数学试题
名校
解题方法
7 . 已知函数
.
(1)求不等式
的解集.
(2)证明:对一切正数
,
,均有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c5670d52c80493089f86da7b0a7e5f.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256f3981024e53f373a80aad40e994ae.png)
(2)证明:对一切正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e12d6485e6f950617d568eeb272aa17.png)
您最近一年使用:0次
2021-10-20更新
|
257次组卷
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4卷引用:四川省乐山第一中学校2021-2022学年高三上学期10月月考文科数学试题
名校
解题方法
8 . 若函数
对任意
,恒有
.
(1)指出
的奇偶性,并给予证明;
(2)如果
时,
,判断
的单调性;
(3)在(2)的条件下,若对任意实数x,恒有
.成立,求k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcbca3478eae63853d2aab5332e2e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd384d86840b7b158af41f56fe29c7d1.png)
(1)指出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)在(2)的条件下,若对任意实数x,恒有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfa531b01a6fad9907d1be6a7d5b1ce2.png)
您最近一年使用:0次
2021-02-28更新
|
827次组卷
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4卷引用:四川省乐山市井研县井研中学2023-2024学年高一上学期10月月考数学试题
四川省乐山市井研县井研中学2023-2024学年高一上学期10月月考数学试题甘肃省宁县第二中学2020-2021学年高一上学期期末数学试题(已下线)第三章 函数专练9—抽象函数-2022届高三数学一轮复习重庆市永川区永川中学校2023-2024学年高一上学期第二次联考数学复习题(二)
9 . 如图,在四棱锥
中,
平面
,
,
,
,
,
为
的中点,
为
的中点.
(1)求证:
平面
;
(2)求二面角
的平面角的正弦值.
![](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/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62526e69e7c4e59d9df8a5b2c2426400.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0baa2f1a925d67fcd406218b83015d13.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/7e717722-6157-4cd8-9d7d-6fa8627749f8.png?resizew=160)
您最近一年使用:0次
名校
10 . 如图,在三棱锥
中,平面
平面
,
,
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/2/4/2650766450302976/2651469665845248/STEM/288492d896c546ebba36de9a88934a22.png?resizew=200)
(Ⅰ)求证:
平面
;
(Ⅱ)设点
是
的中点,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd1b4b5594177f8a42d6d1ed92427a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8352d5c45ab39423140d9d2db6ad192.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4b6c682d7b0741fb1f12a073394fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2021/2/4/2650766450302976/2651469665845248/STEM/288492d896c546ebba36de9a88934a22.png?resizew=200)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2730b513bd3359c3dfe6567e04f5ef9.png)
(Ⅱ)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8e3fa55bdd402647a8c9c55883ac458.png)
您最近一年使用:0次
2021-02-05更新
|
1123次组卷
|
7卷引用:四川省乐山沫若中学2020-2021年高二下学期入学考试数学(理科)试题
四川省乐山沫若中学2020-2021年高二下学期入学考试数学(理科)试题陕西省咸阳市2020-2021学年高三上学期高考模拟检测(一)理科数学试题(已下线)专题29 空间向量与立体几何(解答题)-2021年高考数学二轮复习热点题型精选精练(新高考地区专用)(已下线)专题31 空间向量与立体几何(解答题)-2021年高考数学(理)二轮复习热点题型精选精练(已下线)押第19题立体几何-备战2021年高考数学临考题号押题(浙江专用)云南省楚雄天人中学2020-2021学年高二3月月考数学(理)试题甘肃省武威第二中学2020-2021学年高三下学期开学考试理科数学试题