1 . 已知动点
分别在圆
和
上,动点
在
轴上,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f44755c5fee4b90266eac73ad47a128.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca1f76d593f96f17a696ce7634ab5bf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58147d64340ea78bd7d1ea476a77740b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.圆![]() |
B.圆![]() ![]() |
C.![]() ![]() |
D.过点![]() ![]() ![]() |
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真题
2 . 抛物线C:
的准线为l,P为C上的动点,过P作
的一条切线,Q为切点,过P作l的垂线,垂足为B,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4656dd2b1a1b285bfaa68708bbdea316.png)
A.l与![]() |
B.当P,A,B三点共线时,![]() |
C.当![]() ![]() |
D.满足![]() ![]() |
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名校
3 . 已知点
在圆
上,点
是直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a461995b90655f5133df6f61c2d09bd.png)
上一点,过点
作圆
的两条切线,切点分别为
、
,又设直线
分别交
轴于
,
两点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b31422fa6d9a8461a4c0ac344cd6ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a461995b90655f5133df6f61c2d09bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66ca1a0c83eb6a2058ae381c5775830a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
A.![]() ![]() | B.直线![]() |
C.满足![]() | D.![]() ![]() |
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4 . 已知圆
,直线
是直线
上的动点,过点
作圆
的切线
,切点为
,则当切线长
取最小值时,下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0887c01e30bed3f4d782b38bfd789dda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33b633223c4732ab20661a8850e50634.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272ba94bfb6c8d71049db4b8e07d331a.png)
A.![]() | B.点![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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2024-04-13更新
|
337次组卷
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2卷引用:2024届山西省平遥县第二中学校高三冲刺调研押题卷数学(三)
5 . 法国著名数学家蒙日首先发现椭圆两条互相垂直的切线的交点轨迹是以椭圆的中心为圆心的圆,后来这个圆被称为蒙日圆.已知椭圆
,其蒙日圆为圆
,过直线
上一点
作圆
的两条切线,切点分别为
,
,则下列选项正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0296bd9900adcc311f59ad44e940b86f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5609d2ccc24a7ab59fdbf8d033227f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.圆![]() ![]() | B.四边形![]() |
C.![]() ![]() | D.当点![]() ![]() ![]() ![]() |
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解题方法
6 . 已知点
为圆
的两条切线,切点分别为
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a827fd8990d58c1f979be7b84a438b9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248e009d63256e6a893b037fd67d2b78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
A.圆![]() ![]() ![]() |
B.切线![]() |
C.直线![]() ![]() |
D.![]() |
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7 . 由直线
:
上的一点
向圆
:
引两条切线
,
,A,
是切点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b979396a703fb14715ba39232f5786a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229d3c7defc6ba917177d434d02ab995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.线段![]() ![]() |
B.四边形![]() ![]() |
C.![]() ![]() |
D.当点![]() ![]() ![]() ![]() |
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8 . 已知点
在圆C:
上,点
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb4945ae9388bd0fbdacb79caa9af22a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a0d256036d52b784b8c68bfc8db69d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6938eeb65411eeac15e140cf1db99773.png)
A.直线![]() ![]() |
B.点![]() ![]() |
C.当![]() ![]() |
D.![]() |
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9 . 已知点
和
:
,过P点的两条直线分别与
相切于A,B两点.则以下命题正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e262b7599fda82ae392ac10df97feff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74f8ebed1c19f199dc9165162dc5d3f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb52bba9798c625c7cd778636bceea32.png)
A.![]() |
B.![]() |
C.P、A、Q、B均在圆![]() |
D.A,B所在直线方程为![]() |
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10 . 已知圆
,直线
,点
在直线
上运动,直线
,
分别与圆
切于点
,
.则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7f53d4baf6aa42752f71ac51b3e66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6834ba6de422d87eedd475e419af10fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() ![]() |
B.![]() ![]() ![]() |
C.存在点![]() ![]() |
D.直线![]() ![]() |
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