1 . 设a为常数,
的定义域为R,
,则( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23fb90e09994fdc6ab02ed6ba664f31f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dc9255e2a07ba9252f0e491eaec5d9.png)
A.![]() |
B.![]() |
C.![]() |
D.满足条件的![]() |
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2024-02-10更新
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5卷引用:江苏省无锡市四校2024届高三下学期期初学期调研数学试卷
名校
2 . 在
中,内角
,
,
的对边分别为
,
,
,已知该三角形的面积
.
(1)求角
的大小;
(2)若
时,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af10698482f4981f32978da2d9d4f437.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa4c355f11471a38f5583a434a1ddeb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-02-08更新
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6卷引用:江苏省无锡市四校2024届高三下学期期初学期调研数学试卷
江苏省无锡市四校2024届高三下学期期初学期调研数学试卷陕西省咸阳市2024届高三上学期模拟检测(一)文科数学试题(已下线)考点17 解三角形中的最值问题 --2024届高考数学考点总动员【练】(已下线)重难点3-2 解三角形的综合应用(8题型+满分技巧+限时检测)2024届高三新高考改革数学适应性练习(九省联考题型)广东省广州市西关外国语学校2023-2024学年高一下学期3月月考数学试题
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3 . 已知
是
个正整数组成的
行
列的数表,当
时,记
.设
,若
满足如下两个性质:
①
;
②对任意
,存在
,使得
,则称
为
数表.
(1)判断
是否为
数表,并求
的值;
(2)若
数表
满足
,求
中各数之和的最小值;
(3)证明:对任意
数表
,存在
,使得
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fb9e3bc9630e025a82d66811b3e6441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d7b4bb12628d5ed455d814b8aafa1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/944ff5528bc100046aab83f5919b3d63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e828d4b2d7580fa04607cf8f14b05de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0d7559d8dfa8236ca9d4b1853fbdec.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d801812018b6aa0f5de382062c117757.png)
②对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59796b996ee446726b9c61def65cf99d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b105bdb6be37b0f8c3be1c1a477328e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3555d7cfaba51d818d2600c85089ee28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a0d7559d8dfa8236ca9d4b1853fbdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0e4fe02650625b09285e4fcf7e4dc5.png)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6326460f6bec38cc41124761d15df163.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e518eeb07c02795385449a4f29cc88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/591505c2a0e38da932d32f07e86738d7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aaafb050b24c4e806c480e0665aaa5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e47cd514b2920609e3781c87df6ab70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec03fe13019f0b88d57aeb34cad7441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e47cd514b2920609e3781c87df6ab70.png)
(3)证明:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59639b9c4eadbbfb2f4f2b57d9c4c3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249b92e30f3808f5287db70a9eec6a53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91cf9a662222271515ebdef704f76047.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22130489fa8821bfcb7b54d5b1748acc.png)
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2023-11-09更新
|
3436次组卷
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10卷引用:江苏省无锡市四校2024届高三下学期期初学期调研数学试卷
江苏省无锡市四校2024届高三下学期期初学期调研数学试卷北京市朝阳区2024届高三上学期期中数学试题2024年普通高等学校招生全国统一考试数学模拟试题(一)(新高考九省联考题型)江苏省南通市新高考2024届高三适应性测试数学模拟试题湖南省长沙市长郡中学2024届高三寒假作业检测(月考六)数学试题(已下线)新题型01 新高考新结构二十一大考点汇总-3(已下线)(新高考新结构)2024年高考数学模拟卷(一)(已下线)黄金卷05(2024新题型)湖北省黄冈市浠水县第一中学2024届高三下学期第二次模拟考试数学试题广东省广州市广东实验中学2024届高三教学情况测试(一)数学B卷
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4 . 若
,
,
是空间三个单位向量,
,
夹角为
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1c5bcaa260128e281a12f6ef6aacbc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4775ef429f350aad7e4ca09a55c5c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b979bca6f77fedc2410206e1ff3718a7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 如图,在四棱锥
中,
平面ABCD,底面ABCD是菱形,点O是对角线AC与BD的交点,
,
,M是PD的中点.
(1)求证:
平面PAB;
(2)求证:平面
平面PAC;
(3)当三棱锥
的体积等于
时,求PA的长.
![](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/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/14/418257f7-e3ca-46c7-8280-70028467bd19.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75844725734f498eb983fe76cece2f8.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
(3)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c10c16d2d9d22c4b34ddd965e26aa0d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
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解题方法
6 . 已知向量
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a18798408a1b91fdb12deb79f0b562a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b7a9dbca961d7326a25a8d50ff96469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e843bf3f5c909660592525be765f98c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a18798408a1b91fdb12deb79f0b562a.png)
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7 . 如图,在四棱锥
中,
底面ABCD,四边形ABCD是边长为1的菱形,且
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dbf31dfd36aa456a63bafea8bc1985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba4c15fb8fc3239d45bd4e7d8971f58e.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-09-13更新
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918次组卷
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9卷引用:江苏省无锡市市北高级中学2023-2024学年高二上学期期初检测数学试题
江苏省无锡市市北高级中学2023-2024学年高二上学期期初检测数学试题重庆市石柱回龙中学校2023-2024学年高二上学期9月质量检测数学试题湖南省永州市宁远县第二中学2023-2024学年高二上学期9月联考数学试题四川省广安市友谊中学实验学校2023-2024学年高二上学期10月月考数学试题四川省平昌县第二中学2023-2024学年高二上学期第一次月考数学试题广东省湛江市第一中学2023-2024学年高二上学期第一次大考数学试题(已下线)通关练07 空间向量与立体几何章末检测(二)- 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)(已下线)高二数学上学期期中考模拟卷(空间向量与立体几何+直线和圆的方程)-【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)河北省武安市第三中学等校2024届高三上学期期中联考数学试题
8 . 已知x,y满足
,则
的平方根为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8fc8e4706624378069ea51fe5cd9eff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e25dec7432bcfd5d189db536d5754a.png)
A.2 | B.±2 | C.4 | D.±4 |
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9 . 若
中,
,
,则
面积的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.![]() | B.2 | C.![]() | D.4 |
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10 . 解下列不等式:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3b76cedebe03e7ba487b2989e91440.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626733af6b6dc3e03d5f45c90768269e.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1eaa9cd4b3699df5558b670a61d5a8.png)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed3b76cedebe03e7ba487b2989e91440.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/626733af6b6dc3e03d5f45c90768269e.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a1eaa9cd4b3699df5558b670a61d5a8.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a16ce054d9cad271b309566453b25f4.png)
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