1 . 函数
的单调增区间是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/301a7643aa976ee5b277abfd6b0c26a2.png)
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解题方法
2 . 如图,在正方体
中,
、
分别为
、
的中点,
与
交于点
.求证:
![](https://img.xkw.com/dksih/QBM/2022/2/17/2918488916508672/2935258235150336/STEM/848a2c3e-ed0e-42d2-9cb9-04c7322d6bb6.png?resizew=163)
(1)
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2022/2/17/2918488916508672/2935258235150336/STEM/848a2c3e-ed0e-42d2-9cb9-04c7322d6bb6.png?resizew=163)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b45602e943254f72e918eb85eb6efc7.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acf196ee65674c75ad168fa5fd755d3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3c241f900cb6ed341c137a3d71216a4.png)
您最近一年使用:0次
2022-03-13更新
|
1138次组卷
|
2卷引用:陕西省渭南市临渭区2021-2022学年高一上学期期末数学试题
名校
3 . 台球运动已有五、六百年的历史,参与者用球杆在台上击球.若和光线一样,台球在球台上碰到障碍物后也遵从反射定律如图,有一张长方形球台ABCD,
,现从角落A沿角
的方向把球打出去,球经2次碰撞球台内沿后进入角落C的球袋中,则
的值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/3d03927d-be48-42f7-b96d-83e6dba3f840.png?resizew=136)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/3d03927d-be48-42f7-b96d-83e6dba3f840.png?resizew=136)
A.![]() | B.![]() | C.1 | D.![]() |
您最近一年使用:0次
2020-06-29更新
|
1130次组卷
|
16卷引用:江苏省南通市海安市曲塘中学2022-2023学年高一上学期期初考试数学试题
江苏省南通市海安市曲塘中学2022-2023学年高一上学期期初考试数学试题重庆市第十八中学2022-2023学年高二上学期10月月考数学试题河北省邯郸冀南新区育华实验学校2022-2023学年高二上学期第一次月考数学试题山东省济南市2020届高三6月针对性训练(仿真模拟)数学试题山东省济南市2020届高三6月份模拟考试数学试题(已下线)专题三 三角函数与解三角形-山东省2020二模汇编江苏省南京市江浦高级中学2020-2021学年高三上学期10月月考数学试题(已下线)2021届高三数学新高考“8+4+4”小题狂练(12)江苏省南通市如东高级中学2020-2021学年高一上学期阶段测试(二)数学试题河北省冀州中学2021届高三上学期第三次月考数学试题北师大版(2019) 必修第二册 金榜题名 进阶篇 十一 正切函数的定义 正切函数的诱导公式(已下线)第3讲 直线与方程-2021-2022学年高二数学多选题专项提升(人教A版2019选择性必修第一册)河北省东光县第一中学2021-2022学年高二上学期第一次月考(9月)数学试题(已下线)专题2.10 点、线间的对称关系-重难点题型检测-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)重庆市万州纯阳中学校2021-2022学年高二上学期10月月考数学(B卷)试题重庆市黔江中学校2021-2022学年高二上学期10月考试数学试题
4 . 《九章算术》是人类科学史上应用数学的最早巅峰,是一部问题集,全书分为九章,共收有246个问题,每个问题都有问、答、术三部分组成,内容涉及算术、代数、几何等诸多领域,并与实际生活紧密相连,充分体现了中国人的数学观和生活观.书中第九卷勾股部分记录了这么一个问题:问:今有圆材埋在壁中,不知大小,以锯锯之,深一寸,锯道长一尺,问径几何?术曰:半锯道自乘,如深寸而一,以深寸增之,即材径.如图,术曰所给出的求解公式为:
,则答曰( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/57d4f5d3-0270-4853-8090-b292df6efdc2.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dd0e0872f6998260f1d8467744d856a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/57d4f5d3-0270-4853-8090-b292df6efdc2.png?resizew=176)
A.二尺六寸 | B.二尺五寸 | C.一尺三寸 | D.一尺二寸 |
您最近一年使用:0次
2022-09-09更新
|
431次组卷
|
5卷引用:四川省达州市开江县开江中学2022-2023学年高三上学期入学考试数学(文)试题
5 . 如图,在平面直角坐标系中,已知
,点
在第一象限内,
(
为坐标原点),将
绕点
逆时针旋转,每次旋转
,则第23次旋转后,点
的坐标为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/67da6bac-e7a4-4723-8c12-718764a294cc.png?resizew=144)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd62a0a5ea46f8df7976ccd3666fcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/67da6bac-e7a4-4723-8c12-718764a294cc.png?resizew=144)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 如图,在半径为3的
中,AB是直径,AC是弦,D是
的中点, AC与BD交于点
若E是BD的中点,则AC的长是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/b3fdca4c-87d5-4f19-9404-6aca29983cf7.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a0a98828cab1d9bd9184aa53750bd6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7186b756542b54106635d9256528aa91.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/b3fdca4c-87d5-4f19-9404-6aca29983cf7.png?resizew=135)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-10-23更新
|
730次组卷
|
2卷引用:安徽省合肥市第一中学、第六中学2021-2022学年高一下学期期末联考数学试题
2022高一·全国·专题练习
7 . 如图,曲线AB是抛物线
的一部分(其中A是抛物线与y轴的交点,B是顶点),曲线BC是双曲线
的一部分,曲线AB与BC组成图形W.由点C开始不断重复图形W形成一组“波浪线”.那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
______ ;若点
,
在该“波浪线”上,则
的值为______ ,
的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0162f06b60c864d10e09c4d66796f3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45bd7e92dae1e0c2af6c33d5e202f544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f100f99d9272ee6d2c8a2978b40a6fd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c493408b3a1cb732846dc2c288dd33be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/23/d31a6309-98a6-44eb-9c13-72f23d7eec42.png?resizew=275)
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8 . 《几何原本》卷2的几何代数法(以几何方法研究代数问题)成了后世西方数学家处理问题的重要依据,利用这一方法,很多代数的公理或定理都能够通过图形实现证明.现有如图所示图形,点F在半圆O上,且
,点C在线段OB上.设
,
.结合该图形解答以下问题:
![](https://img.xkw.com/dksih/QBM/2022/10/5/3081057399521280/3083291043676160/STEM/be658cc3080d48dfbe97e30855978e09.png?resizew=168)
(1)用a,b表示OF,OC,FC;
(2)根据OF与FC的大小关系,结合(1)的结论可得到什么不等式?并证明
是该不等式取等号的充要条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ebef5bab02280cdc99cc7f689135cd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3d296e0d7154a170cb7d3ae42989b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a88b719166fcc1431f876bc8c5656c.png)
![](https://img.xkw.com/dksih/QBM/2022/10/5/3081057399521280/3083291043676160/STEM/be658cc3080d48dfbe97e30855978e09.png?resizew=168)
(1)用a,b表示OF,OC,FC;
(2)根据OF与FC的大小关系,结合(1)的结论可得到什么不等式?并证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f22fec5a381ae8aca93d876e54c79de.png)
您最近一年使用:0次
2022-10-08更新
|
260次组卷
|
5卷引用:山西省太原市第十二中学2022-2023学年高一上学期9月月考数学试题
9 . 如图(1),抛物线
经过
,
两点,并与直线
(
为常数,且
)交于
、
两点,直线
过点
且平行于
轴,过
、
两点分别作直线
的垂线,垂足分别为点
、
.
(1)求此抛物线的解析式;
(2)猜想与证明:
①
______
______
(填“>”“<”或“=”)
②
为______三角形(填“锐角”、“直角”或“钝角”)并证明你的猜想
(3)如图(2)点
为坐标平面内一点,点
是抛物线上任意一点,求
周长最小值,并求出此时
点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8e335fecc2105f095fe41e8739db935.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238f0ea276a00ae8d681ce00cc11c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edaef66a0582e95fb5c57a405acdea9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c35bf8c29fc8004451de66e12b4de9fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/12c91dec-63b2-4907-b4ec-b41b9b0a5f64.png?resizew=176)
(1)求此抛物线的解析式;
(2)猜想与证明:
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
(3)如图(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48eced443f5b969c6be558849c7bd8ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ab141e7a809aa0f7f46c9df9de2b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/29/c30b9589-f196-4fe9-a412-6beaac51879c.png?resizew=175)
您最近一年使用:0次