1 . 在△
中,
,
,
,
为线段
上一点,则
的取值范围为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03fec9ae9ba6148dae874920f1988028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0e63cbaf0f034ac19952460a04184e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5a03ecc401bb85e2a4e66117d10c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081c0c7fd9e71eb04277e8a23a430f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/817ddd41a32b979b0ed2a027bac165eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005c72e80fda2a8dc485d3a166d0db1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c33b01059333c0ce183b0391637d8ea6.png)
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2018-08-12更新
|
911次组卷
|
2卷引用:【全国区级联考】北京市通州区2018届下学期高三三模考试数学(文科)试题
名校
2 . 如图,已知四边形
为菱形,且
,取
中点为
.现将四边形
沿
折起至
,使得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/eea842dd-27de-403d-ba06-8523cc7fd8cc.png?resizew=282)
(Ⅰ)求证:
平面
;
(Ⅱ)求二面角
的余弦值;
(Ⅲ)若点
满足
,当
平面
时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a6f36741b86f464be362b12bac13d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e1e4ea140260a790885868bc7a94f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b29f99026a0ea8890fcd5ad58aebfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65b5be85715f868fe603eba37ca0fd94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/2/eea842dd-27de-403d-ba06-8523cc7fd8cc.png?resizew=282)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b29f99026a0ea8890fcd5ad58aebfb.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be00ab92da5293c11886eb75fc963733.png)
(Ⅲ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4025ed22666217a6881e5cee62986b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4add4f2d0dc3b8832581436af6aad41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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名校
解题方法
3 . 给出下列四个函数:①
;②
;③
;④
,其中值域为
的函数的序号是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b629bea8e22de9bfc49158e2289871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14e4ee67cc690aa7f9d4a5c29c8ef39b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbf2928b8abccc5c6cfb5d6511c22168.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dbd66b2af62ffab9b988032341a910c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dcdd87d593df4a5c5e98d47fe1cfa6.png)
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2020-08-03更新
|
391次组卷
|
5卷引用:北京市通州区2020届高考一模数学试题
北京市通州区2020届高考一模数学试题内蒙古集宁一中2019-2020学年高二下学期第三次月考数学(理)试题(已下线)专题11 函数性质的综合运用-2020年高考数学(理)母题题源解密(全国Ⅱ专版)(已下线)专题12 函数性质的综合运用-2020年高考数学(文)母题题源解密(全国Ⅱ专版)(已下线)专题13 函数及其性质-2020年高考数学母题题源解密(北京专版)
13-14高一上·浙江杭州·期末
名校
解题方法
4 . 正方形
的边长为1,
是
边上的动点,则
的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d25a4e0427556caaba827a42f65f23.png)
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2020-02-28更新
|
378次组卷
|
8卷引用:【区级联考】北京市通州区2019届高三上学期期中考试数学(理)试题
【区级联考】北京市通州区2019届高三上学期期中考试数学(理)试题(已下线)2012-2013学年浙江省杭州十四中高一上学期期末考试数学试卷(已下线)2014届江苏省扬州中学高三开学检测理科数学试卷上海市七宝中学2020届高三上学期11月月考数学试题2020届陕西省西安市西北工业大学附中高三下学期4月适应性测试数学(文)试题(已下线)专题13 平面向量-2020年高考数学母题题源解密(江苏专版)(已下线)8.1.1向量数量积的概念练习(1)沪教版(2020) 必修第二册 领航者 第8章 平面向量 8.4 向量的应用 第2课时 向量的应用(2)
5 . 如图,某城市中心花园的边界是圆心为O,直径为1千米的圆,花园一侧有一条直线型公路l,花园中间有一条公路AB(AB是圆O的直径),规划在公路l上选两个点P,Q,并修建两段直线型道路PB,QA.规划要求:道路PB,QA不穿过花园.已知
,
(C、D为垂足),测得OC=0.9,BD=1.2(单位:千米).已知修建道路费用为m元/千米.在规划要求下,修建道路总费用的最小值为_____ 元.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34ae16cdf6ce02a4adae05b010d59f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0a2d7d40a6c0bf1fddb802db381689.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/ab914209-e142-4660-b60c-4f0af2800bb3.png?resizew=251)
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6 . 定义集合
与集合
之差是由所有属于
且不属于
的元素组成的集合,记作
且
.已知集合
.
(Ⅰ)若集合
,写出集合
的所有元素;
(Ⅱ)从集合
选出10个元素由小到大构成等差数列,其中公差的最大值
和最小值
分别是多少?公差为
和
的等差数列各有多少个?
(Ⅲ)设集合
,且集合
中含有10个元素,证明:集合
中必有10个元素组成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c3880c63ce7b6d63d2e750e769a3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e10255d9c38c5db2be76d20e809acb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4145f9a71b24150789ecb5a301da5c51.png)
(Ⅰ)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dffead0cccaa005fd8904688b9f510d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb5cb0be6ec660ff6eb629c930415a99.png)
(Ⅱ)从集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
(Ⅲ)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/952f1e0ce5bd53a6d5e8bb07ea2da5f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4bad080cc20dc6c55fc75d6376814c3.png)
您最近一年使用:0次
7 . 在极坐标系中,若点
在圆
上,则点
到直线
距离的最大值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f99a1f62cd3bdbf096679aeef1fa9b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71499f4b37b2434900aa7223df3b2b0.png)
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8 . 若
,则下列各式中一定正确的是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d229cbec798c9c278a9b5979cb38247.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-09更新
|
292次组卷
|
3卷引用:2020届北京市通州区高三第一学期期末考试数学试题
2020届北京市通州区高三第一学期期末考试数学试题2020届高三2月第01期(考点10)(文科)-《新题速递·数学》(已下线)专题09 必拿分题目强化卷(第一篇)-备战2021年新高考数学分层强化训练(北京专版)
名校
解题方法
9 . 若定义域均为
的三个函数
满足条件:
,点
与点
都关于点
对称,则称
是
关于
的“对称函数”.已知
,
是
关于
的“对称函数”,且
恒成立,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe01a80fd255846ef9aa0d9735a7f37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7133bddc896d4af6175168e8a580f4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50faa10fee32e3dcfd3382b0aa87ba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d3384e30ea273b83f80569892c9cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e3aa14fd534f416fa3b1b83b2e533d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74314814cdc6fb803abb4692458af131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://img.xkw.com/dksih/QBM/2016/9/13/1573019552628736/1573019558707200/STEM/96b1d39d796a4a86ae2ea7d3428dfb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74314814cdc6fb803abb4692458af131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cb27b3f75a9535e0e5a6f020b735f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
669次组卷
|
2卷引用:2016届北京通州区高三4月一模数学(理)试卷
10 . 已知函数
,
.设
.
(1)判断函数
的奇偶性,并证明你的结论;
(2)求
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e44284cb19805a584880a686ac3df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d1821d2bc56bf8ac6789fcfffef9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e15c2171c1be9ec394494ad822a048d.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
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