名校
1 . 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
名校
2 . 如图,在四棱锥
中,底面
为正方形,侧面
是正三角形,侧面
底面
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/66ef5b8c-30a0-4d46-8389-98dfe3fa12a7.png?resizew=196)
(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/852aabd89edffc1b94344ff3f1f31ccd.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/30/66ef5b8c-30a0-4d46-8389-98dfe3fa12a7.png?resizew=196)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
您最近一年使用:0次
2021-08-09更新
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852次组卷
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15卷引用:重庆市江津中学2020-2021学年高一下学期第三阶段考试数学试题
重庆市江津中学2020-2021学年高一下学期第三阶段考试数学试题山东省菏泽市第一中学八一路校区2019-2020学年高一6月月考数学试题江苏省南通市如皋中学2020-2021学年高一下学期第二次阶段考试数学试题广东省梅州市兴宁市沐彬中学2021-2022学年高一下学期3月月考数学试题河北省衡水市第二中学2022-2023学年高一下学期学科素养评估(四调)数学试题人教A版(2019) 必修第二册 逆袭之路 第八章 立体几何初步 小结 复习参考题 8(已下线)第八章知识总结及测试-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)吉林省长春市第二十九中学2020-2021学年高二下学期期末考数学(理)试题(已下线)第八章 立体几何初步单元自测卷(一)(已下线)期末考测试(基础)-2021-2022学年高一数学一隅三反系列(人教A版2019必修第二册)河南省濮阳市2021-2022学年高一下学期期末数学(理科)试题河南省濮阳市2021-2022学年高一下学期期末数学文科试题吉林地区普通高中友好学校联合体2021-2022学年高一下学期期末考试数学试题广东省实验中学附属江门学校2022-2023学年高二上学期开学考试数学试题河南省南阳市南召县2022-2023学年高一下学期期末数学试题
名校
解题方法
3 . (1)对于平面向量
,
,求证:
,并说明等号成立的条件;
(2)对于任意的
,
求证:
;
(3)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3a6e4ff5a1a5977357f04020df2322.png)
(2)对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ac12138178cb539a9e1c8f77587038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc888cdc660dc71f51d100fc7746eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920a38dd1573498365963519c3bd2daa.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c5e59b2552eb5f033aea9e034e87ba.png)
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解题方法
4 . 已知函数
.
(Ⅰ)求函数
在
处的切线方程;
(Ⅱ)若关于x的不等式
恒成立,求实数a的值;
(Ⅲ)设函数
,在(2)的条件下,证明:
存在唯一的极小值点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d3b341e8d416d62621f154d7fb3a32e.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(Ⅱ)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4955c5adc717b7f6f0b975e0724ff5.png)
(Ⅲ)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bca4be345087f993a4078e16c16608e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09c7c336fb0fcc0abc3d1da4da8c9ec.png)
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5 . 如图,四棱锥
面
面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/cacd822b-141d-4be7-9bc6-5a1d40c0b358.png?resizew=208)
(1)证明:
及
面
;
(2)求二面角
的余弦值;
(3)线段
上一动点E,设直线
与面
所成角为
,则E在何处时,
的值最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a061d9c4c30ef4aed324be52ef2f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967d47ca1cbdaaf30baf00c79d8503fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66301f26e6d528ab482d753d90e9931.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/cacd822b-141d-4be7-9bc6-5a1d40c0b358.png?resizew=208)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eee8e3e106015df4da241290765dc828.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
(3)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
您最近一年使用:0次
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解题方法
6 . 已知函数
,
.
(1)当
时,求证:
;
(2)记数列
的前
项和为
,若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30a1d87ac9d34e54f24c3e5e45c256fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c67a7e28dba059006021a2e2105f538.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
(2)记数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8f8a95cad6b3fd35e42f582f9a3e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/591a4b3ababc7b2025d0421530a7f53f.png)
您最近一年使用:0次
2021-03-24更新
|
333次组卷
|
2卷引用:重庆市巴蜀中学2021届高考适应性月考卷(八)数学试题
2022高三·全国·专题练习
名校
解题方法
7 . 已知函数
,其中
,令
.
(1)求证:当
时,
无极值点;
(2)若函数
,是否存在实数
,使得
在
处取得极小值?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc05d5090a33bda45fc5be0775a3686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585de67a3fc494297d375d339af6d153.png)
(1)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93858df8b2812afc55316bfa8028f837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6123442fa13ecf49964191cd1983392a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
您最近一年使用:0次
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8 . 如图,在四棱锥
中,底面
是边长为2的正方形,
.
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763349769584640/2776337729994752/STEM/2b4e997414be449ab2f325908d071107.png?resizew=179)
(1)证明:
平面
;
(2)若
,求二面角
的正弦值.
![](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/375ecd063702e08b0b755ff5b9a75875.png)
![](https://img.xkw.com/dksih/QBM/2021/7/13/2763349769584640/2776337729994752/STEM/2b4e997414be449ab2f325908d071107.png?resizew=179)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ac2a2bb310b6d49725ebbe7581c3b6.png)
您最近一年使用:0次
2021-07-31更新
|
425次组卷
|
3卷引用:重庆市朝阳中学2021-2022学年高二上学期10月月考数学试题
名校
解题方法
9 . 三棱柱
中,点D为线段
上一点,
和
均是以
为底边的等腰三角形.
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709736376066048/2772114733203456/STEM/1aea3a8a2bcb4d33a4d5af2bb1ef37ea.png?resizew=222)
(1)求证:
;
(2)若点
,二面角
的余弦值为
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709736376066048/2772114733203456/STEM/1aea3a8a2bcb4d33a4d5af2bb1ef37ea.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/623f49f1a30f13a3f6706142ed0f92f4.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee185edf45ccae73ded2a867a941af0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ddd2c1429318aba357972d600cf2cd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547e6415e5b026a5b716925371ee4302.png)
您最近一年使用:0次
10 . 已知
是各项均为正数的等差数列,且
成等比数列,数列
满足
,
.
(1)求证:
为等比数列;
(2)若
,
的前n项和为
,
,求数列
的前n项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcd9a1492c60152f2e32604cd519e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebba914a3863bcf95495fda6fd84b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42508dd2bbf426186f64c45c9696626d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e0d6706ba95b20b82708c339d226a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba57c83d526ac308d1461e80fcca9f36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
您最近一年使用:0次