名校
1 . 在四棱锥
中,
平面
,△
为等边三角形,
,
,
,
分别为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/10/7/2824041613950976/2825628403843072/STEM/c040eb867fea4e5b904766cdadc9ead9.png?resizew=208)
(1)求证:
平面
;
(2)求平面
与平面
所成锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3520ee9cc97a075e889e1625dba1157c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3cbb0e21389791a038f7a9ce6a327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/2021/10/7/2824041613950976/2825628403843072/STEM/c040eb867fea4e5b904766cdadc9ead9.png?resizew=208)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2021-10-09更新
|
635次组卷
|
3卷引用:重庆市杨家坪中学2021-2022学年高二上学期第二次月考数学试题
名校
解题方法
2 . 如图,在四棱锥
中,侧面
为等边三角形,底面
为等腰梯形,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0feb78b69c24f4ceb70f889f61162d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1e75a6acf8fe811037dcbd210440db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/5667727d-7e12-4610-b77b-7e4b90b6b729.png?resizew=151)
(1)证明:平面
平面
;
(2)若点
在棱
上,且二面角
的大小为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb0feb78b69c24f4ceb70f889f61162d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1e75a6acf8fe811037dcbd210440db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/5667727d-7e12-4610-b77b-7e4b90b6b729.png?resizew=151)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877582b5387278008d14fe5932622fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/defa5b53043ae802bb1af7d14374406d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96fe44cb45b52ade75574ed31d05fb26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd374fb0a2f632b75c65f9f111b47f5d.png)
您最近一年使用:0次
2021-11-09更新
|
390次组卷
|
2卷引用:重庆市杨家坪中学2023-2024学年高二上学期第一次月考数学试题
名校
解题方法
3 . 在如图所示的空间几何体中,平面
平面
与
均是等边三角形,
,
和平面
所成的角为
,且点
在平面
上的射影落在
的角平分线上.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/8c9edf40-6ae2-48e1-ba4e-1488b63efc2e.png?resizew=194)
(1)求证:
平面
;
(2)求多面体
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17580410bf63dba4fe164265afaac4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e179513f9fdf253e425fd9a4d2c3528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f941c5fba24bdeea8da41495323103e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/8c9edf40-6ae2-48e1-ba4e-1488b63efc2e.png?resizew=194)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求多面体
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64515eca2696cc35da2b5c698768ec31.png)
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名校
解题方法
4 . 在四棱锥
中,底面
是矩形,
平面
,
,
,线段
的中点为
,点
为
上的点,且
.
![](https://img.xkw.com/dksih/QBM/2021/10/11/2826991532228608/2827553409990656/STEM/380c8f5137f4454bbfb9d1e75dd949ad.png?resizew=239)
(1)求证:平面
⊥平面
;
(2)求二面角
平面角的余弦值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c2753753faf2cb9a0003aa8e3945159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12d3d97021a64f7a2ff5136f0836992c.png)
![](https://img.xkw.com/dksih/QBM/2021/10/11/2826991532228608/2827553409990656/STEM/380c8f5137f4454bbfb9d1e75dd949ad.png?resizew=239)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7841fca64062a1f2112de9e696921.png)
您最近一年使用:0次
2021-10-12更新
|
547次组卷
|
3卷引用:重庆市育才中学校2021-2022学年高二上学期第一次月考数学试题
名校
5 . 如图,在三棱锥
中,
,
,
,
,
,
为线段
的中点,
为线段
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/2d3d3c6a-3820-49f6-aec3-21812f06aebf.png?resizew=140)
(I)求证:
;
(II)当
平面
时,求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/2022/11/2/2d3d3c6a-3820-49f6-aec3-21812f06aebf.png?resizew=140)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5d56d8170b764b80a672cd6c861921.png)
(II)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8c2b786c64e6a9ed2ec5670cde74f86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
名校
6 . 如图,在平行六面体
中底面
是边长为
的菱形,
,
为
的中点,
为
上一点,
平面
,
.
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736615037394944/2803263199297536/STEM/7d0879f4-1678-4340-903c-795feba051d5.png?resizew=257)
(I)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c02ffbf0d9a3a73b896732082710c2f.png)
(II)若
,
,①求证:该平行六面体为直四棱柱;②求二面角
.
![](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/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f306ff6d237cd9d847aa109acf9333d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70db40c42655327adee01caedfc9d50c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc55d282b5786fc0ac1fcf7e706e3a1.png)
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736615037394944/2803263199297536/STEM/7d0879f4-1678-4340-903c-795feba051d5.png?resizew=257)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c02ffbf0d9a3a73b896732082710c2f.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e5c289b8aabdbfba95c7fd1e1842f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05d2c1b3fd7524383736c72f4c0f1f27.png)
您最近一年使用:0次
名校
7 . 如图,在三棱锥P-ABC中,△ABC为等边三角形,PA=AB=2,PB=PC=2
.
![](https://img.xkw.com/dksih/QBM/2021/9/16/2809487997706240/2815193386582016/STEM/73592926-6c71-44a6-837d-56cd7b12c957.png?resizew=275)
(1)证明:BC⊥PA.
(2)若
,求二面角B-AQ-C的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/2021/9/16/2809487997706240/2815193386582016/STEM/73592926-6c71-44a6-837d-56cd7b12c957.png?resizew=275)
(1)证明:BC⊥PA.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa3aab4d2fdb58b196eb17e94c08bd15.png)
您最近一年使用:0次
2021-09-24更新
|
632次组卷
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3卷引用:重庆市九龙坡区育才中学校2024届高三下学期阶段测试数学试题
名校
8 . 已知
.
(1)求函数
的单调区间:
(2)设
,
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f997d106b584b15aaac835a749c5c6bf.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc807f76d58df49f083de0c4a21eff3.png)
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2021-09-01更新
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553次组卷
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4卷引用:重庆市育才中学2022届高三上学期高考适应性考试(二)数学试题
重庆市育才中学2022届高三上学期高考适应性考试(二)数学试题山东省济宁市嘉祥县第一中学2021-2022学年高三上学期10月份月考数学试题(已下线)专题15 导数法妙解不等式的问题-备战2022年高考数学一轮复习一网打尽之重点难点突破四川省泸州市泸县第四中学2021-2022学年高二下学期期中数学理科试题
名校
9 . 如图,在三棱柱ABC-A1B1C1中,已知AB⊥侧面BB1C1C,AB=BC=1,BB1=2,∠BCC1=
.
![](https://img.xkw.com/dksih/QBM/2021/8/5/2779524736557056/2782329421832192/STEM/a0ec80d1-3f1e-4cb3-b8c6-069d02820fd3.png?resizew=259)
(1)求证:C1B⊥平面ABC;
(2)设
,且平面AB1E与BB1E所成的锐二面角的大小为30°,试求λ的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://img.xkw.com/dksih/QBM/2021/8/5/2779524736557056/2782329421832192/STEM/a0ec80d1-3f1e-4cb3-b8c6-069d02820fd3.png?resizew=259)
(1)求证:C1B⊥平面ABC;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96241188e314807d197f59dd63cb8b7.png)
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2021-08-09更新
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442次组卷
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2卷引用:重庆市育才中学2022届高三上学期高考适应性考试一数学试题
10 . 已知函数
在
处的切线
与直线
平行,函数
.
(1)求实数
的值;
(2)若函数
存在单调递减区间,求实数
的取值范围;
(3)设
是函数
的两个极值点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec1fc46d572c50ad35ffa25c6712864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e677ca9f38907cf0a666af35c8cc9914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc4de3aec10d1651858f9e47e28d3d2f.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aca579894dad67bc82cb715fd48e0d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b246546fe34d66f6f9fb3b75e047e6b.png)
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2021-07-09更新
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1477次组卷
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4卷引用:重庆市育才中学2022届高三上学期高考适应性考试一数学试题
重庆市育才中学2022届高三上学期高考适应性考试一数学试题湖南省湖湘教育三新探索协作体2020-2021学年高二下学期4月期中联考数学试题(已下线)第11讲 双变量不等式:极值和差商积问题-突破2022年新高考数学导数压轴解答题精选精练(已下线)第11节 利用导数解决函数的极值最值