2018高三·全国·专题练习
名校
1 . 已知函数
,若方程
恰有三个实数根,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96ee975cd32e42962d574dcc23daab5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe68aa8a21f26b6b9f6889369aa5905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-03-17更新
|
660次组卷
|
3卷引用:2-8 函数与方程(高效训练)-2019版导学教程一轮复习数学(人教版)
(已下线)2-8 函数与方程(高效训练)-2019版导学教程一轮复习数学(人教版)2017届福建省宁德市高三第一次(3月)质量检查数学理试卷山西省应县第一中学校2018-2019学年高二下学期期末考试数学(理)试题
2010高三·全国·专题练习
2 . 如图所示,过
外一点
作一条直线与
交于
,
两点,已知
,点
到
的切线长
,则弦
的长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.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/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5fca8c94add435f4aefb933ffe55a01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
3 . 已知直角三角形周长为
,一锐角平分线分对边为3:5两部分.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/15819737-6aa9-4c81-ac40-9cf2e8d0f6a7.png?resizew=128)
(1)求直角三角形的三边长;
(2)求两直角边在斜边上的射影的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2442fce668d789c1019394a11ffa6450.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/15819737-6aa9-4c81-ac40-9cf2e8d0f6a7.png?resizew=128)
(1)求直角三角形的三边长;
(2)求两直角边在斜边上的射影的长.
您最近一年使用:0次
4 . 如图,AB为⊙O的直径,过点B作⊙O的切线BC,OC交⊙O于点E,AE的延长线交BC于点D.
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029659099136/1573029664481280/STEM/26e7223a52e742e0aa322cdfd1b4c576.png)
(Ⅰ)求证:CE2=CD•CB
(Ⅱ)若D为BC的中点,且BC=2
,求AB与DE的长.
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029659099136/1573029664481280/STEM/26e7223a52e742e0aa322cdfd1b4c576.png)
(Ⅰ)求证:CE2=CD•CB
(Ⅱ)若D为BC的中点,且BC=2
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029659099136/1573029664481280/STEM/62d59126a38745629a9bfe1e08752716.png)
您最近一年使用:0次
5 . 如图所示,AE切⊙D于点E,AC=CD=DB=10,则线段AE的长为
![](https://img.xkw.com/dksih/QBM/2017/7/19/1733338968555520/1734026604756992/STEM/109cc7d366e440f2b0ccdb5b3d4328ab.png?resizew=143)
![](https://img.xkw.com/dksih/QBM/2017/7/19/1733338968555520/1734026604756992/STEM/109cc7d366e440f2b0ccdb5b3d4328ab.png?resizew=143)
A.10 | B.16 | C.10 | D.18 |
您最近一年使用:0次
6 . 如图,在⊙O中,AB是弦,AC是⊙O的切线,A是切点,过 B作
BD⊥AC于D,BD交⊙O于E点,若AE平分∠BAD,则∠BAD=
![](https://img.xkw.com/dksih/QBM/2017/7/19/1733338968555520/1734026604748800/STEM/8c6859fc979844b9aba9882caf453eff.png?resizew=104)
BD⊥AC于D,BD交⊙O于E点,若AE平分∠BAD,则∠BAD=
![](https://img.xkw.com/dksih/QBM/2017/7/19/1733338968555520/1734026604748800/STEM/8c6859fc979844b9aba9882caf453eff.png?resizew=104)
A.30° | B.45° | C.50° | D.60° |
您最近一年使用:0次
7 . 已知PQ与圆O相切于点A,直线PBC交圆于B、C两点,D是圆上一点,且AB∥DC ,DC的延长线交PQ于点Q.
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572588562546688/1572588568035328/STEM/ac6ae66cfecc4ccab7864831b5a9c67e.png)
(1)求证: AC2=CQ×AB;
(2)若AQ=2AP,AB=
,BP=2,求QD.
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572588562546688/1572588568035328/STEM/ac6ae66cfecc4ccab7864831b5a9c67e.png)
(1)求证: AC2=CQ×AB;
(2)若AQ=2AP,AB=
![](https://img.xkw.com/dksih/QBM/2016/4/12/1572588562546688/1572588568035328/STEM/6c62ee9cadb44de8820f95ed21ba65d8.png)
您最近一年使用:0次
2016-12-03更新
|
316次组卷
|
4卷引用:福建省2016届高三毕业班总复习(几何选讲)单元过关平行性测试卷(文理科)数学试题
2014高三·全国·专题练习
名校
8 . 已知直线2x-my+1-3m=0,当m变动时,所有直线都通过定点
A.(-![]() | B.(![]() | C.(![]() | D.(-![]() |
您最近一年使用:0次
2016-12-03更新
|
2740次组卷
|
9卷引用:2015高考数学(理)一轮配套特训:8-1直线的倾斜角与斜率、直线方程
(已下线)2015高考数学(理)一轮配套特训:8-1直线的倾斜角与斜率、直线方程智能测评与辅导[文]-直线与圆山西省大同市第一中学2017-2018学年高二上学期期中考试数学试题1山西省大同市第一中学2017-2018学年高二上学期期中考试数学试题2(已下线)章末检测3(课后作业)-2018-2019版数学创新设计课堂讲义同步系列(人教A版必修2)安徽省合肥市肥东县高级中学2020-2021学年高二上学期第二次月考数学(理)试题江西省南昌县莲塘第三中学2020-2021学年高二上学期期中考试数学试题山西省长治市第二中学2021-2022学年高二上学期第一次月考数学试题四川省南充高中2019-2020学年高一下学期第一次月考试题数学(文科)试题
2010·广东汕头·一模
9 . 如图,圆O的割线PBA过圆心O,弦CD交PA于点F,且△COF∽△PDF,PB ="OA"=2,则PF= ____________
![](https://img.xkw.com/dksih/QBM/2013/6/13/1571243317706752/1571243323326464/STEM/2efab2c43bc04ebf92fce446f4ca2a46.png?resizew=196)
您最近一年使用:0次
2013·宁夏银川·模拟预测
10 . 几何证明选讲.
如图,直线
过圆心
,交⊙
于
,直线
交⊙
于
(不与
重合),直线
与⊙
相切于
,交
于
,且与
垂直,垂足为
,连结
.
![](https://img.xkw.com/dksih/QBM/2013/7/23/1571306231545856/1571306237468672/STEM/3e839a131716406a92308c1b21003b8c.png)
求证:(1)
;
(2)
.
如图,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://img.xkw.com/dksih/QBM/2013/7/23/1571306231545856/1571306237468672/STEM/3e839a131716406a92308c1b21003b8c.png)
求证:(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e3c6f8a0f45cbcd1e09a3939b2147c.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb1384585ba99937ac66536d54b3f808.png)
您最近一年使用:0次