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1 . 下列命题正确的是( )
A.“若两直线平行,则斜率相同”的逆否命题; |
B.已知直线l,m,平面![]() ![]() ![]() ![]() |
C.“若![]() ![]() ![]() |
D.已知圆C:![]() ![]() ![]() |
您最近一年使用:0次
2023-03-24更新
|
278次组卷
|
2卷引用:安徽省芜湖市第一中学2019-2020学年高二上学期阶段性测试(二)理科数学试题
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2 . 如图,圆
在第一象限,且与
轴、直线
均相切,圆心都在直线
上. 当圆
相外切时,记圆
的面积分别为
,则
( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/b4ef4568-d9ad-451b-95e9-3f47edb44071.png?resizew=200)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86bebdf5931efbdc627baa52f97392e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23fb917816706e46935cf225893e3ab3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/b4ef4568-d9ad-451b-95e9-3f47edb44071.png?resizew=200)
A.1 : 2 | B.1 : 4 |
C.1 : 9 | D.1 : 16 |
您最近一年使用:0次
2021-11-04更新
|
307次组卷
|
2卷引用:浙江省绍兴市诸暨市2017-2018学年高一下学期期末数学试题
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3 . 如图,在平面直角坐标系
中,过
外一点
引它的两条切线,切点分别为
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f798964a881ea48b2c79b7fd96ebd7.png)
,则称
为
的环绕点.
![](https://img.xkw.com/dksih/QBM/2021/8/2/2777681467408384/2782948712816640/STEM/0826976a-b1f6-4b0f-b7d9-ac20165ed90b.png?resizew=259)
(1)当
O半径为1时,
①在
中,
的环绕点是__________.
②直线
与
轴交于点
,与
轴交于点
,若线段
上存在
的环绕点,求
的取值范围;
(2)
的半径为1,圆心为
,以
为圆心,
为半径的所有圆构成图形
,若在图形
上存在
的环绕点,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f798964a881ea48b2c79b7fd96ebd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b685bc5ff8d47424c0d4f2f8c08e58bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://img.xkw.com/dksih/QBM/2021/8/2/2777681467408384/2782948712816640/STEM/0826976a-b1f6-4b0f-b7d9-ac20165ed90b.png?resizew=259)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f4280e5155144bc68b74ecd9e3de45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
②直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/091e86ca89e484b331fd90125a5e5af3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180735d52856f4393e40e28e7fcc95bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c013c86ffcabc839b93c5725519c7fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c00653a92e7962ecc3a9cc1a4a49e8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9347ab0d001ed7e8f51f9886ce88ac64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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