解题方法
1 . 已知点
,过点P向直线
:
和
:
作垂线,垂足分别为点M,N,则线段MN的长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f40d5459e1385ab7d829ea96ca0b946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cc81cfaccc00aa4b7139de5a35a102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d532ce76942846df88c6f66112e50f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
2 .
、
是已知圆
的两条互相垂直的半径,延长
至点P,延长
至点Q.使得
,
.
(1)若直线OP和OQ的斜率都存在,试确定直线OP和OQ的斜率的乘积是否为一个常数?
(2)试确定
是否为一个常数?
(3)设
.试确定是否存在两个定点
、
,使
,
的斜率的乘积为一个常数?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88ec2dbad3fa6208c0493291e5ccdcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f304a24bb2e199772c53223db7b4be9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88ec2dbad3fa6208c0493291e5ccdcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f304a24bb2e199772c53223db7b4be9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d388a3e54d3a0a19d064fc7ca00459b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/799a839722766253265f9da8d582982b.png)
(1)若直线OP和OQ的斜率都存在,试确定直线OP和OQ的斜率的乘积是否为一个常数?
(2)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc54eca5a663aa7a6bc2273bc05869d.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074185b639a471cbc8107e54bac0fe66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07c2cc110e46ae4b3432814810e28bcf.png)
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解题方法
3 . 直角坐标系中,曲线
围成的图形的面积是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24b4be8be0a986e703df7b0dc3f3401c.png)
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4 . 已知点在圆
上,点
在曲线
上,则
的最小值为
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5 . 已知
,则满足条件
的点
所形成的区域的面积为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be315e528951120e7d551f654d2a1f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f990d8ca53b184e3a704201798f11f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
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解题方法
6 . 点在圆
上移动,点
在椭圆
上移动,则线段
的最大值为
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7 . 设集合
为平面坐标系
内的点集,若对于任意
,存在
,使得
,则称点集
满足性质
.给出下列四个点集:
①
;
②
;
③
;
④
.
其中所有满足性质
的点集的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6a7e9127909f984468df1b78486c28b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355c6295d218cd43e397064c7dcc19c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87d40d7bb263b5d955f45b08fc18b102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8474cdfdd0946cd8f40a72510ba666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98a22610675deb997cb889b6dde218ad.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7eaec17322520a81ff971e744641256.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b0b32a912988f14cd2b05a4ae0fc2b.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de85d9405d2ffe47cad184d7779714a.png)
其中所有满足性质
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.①② | B.②③ | C.①②③ | D.③④ |
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解题方法
8 . 过点
作圆
的弦,其中弦长为整数的条数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c5c451435899ab8c0b2e61e015e653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438de02ac1ab0c890240a96fa84037c3.png)
A.36 | B.37 | C.72 | D.74 |
您最近一年使用:0次
2024-03-15更新
|
61次组卷
|
2卷引用:第十二届高二试题(A卷)-“枫叶新希望杯”全国数学大赛真题解析(高中版)
解题方法
9 . 已知实数
满足方程
,记
的最小值为
,则以
为圆心,
为半径的圆的方程为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370457261d4292d9650b2fa864ae83a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6870cb66d351058d94f8ed6f26cd8e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094cba781181aeb90752170e9ba6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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解题方法
10 . 过点
作圆
的两条切线,切点分别为
,求经过圆心
和切点
这三点的圆的方程及弦长
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b910896ff127455ae20ce6725f5c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48cc7aee75cc2b97639c5139abf96c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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