解题方法
1 . 将两圆方程
作差得到直线
的方程,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ead82b3246214b4df96d7645e6bfa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
A.![]() |
B.直线![]() ![]() |
C.存在实数![]() ![]() |
D.若![]() ![]() |
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2022-11-10更新
|
367次组卷
|
2卷引用:河北省部分学校2022-2023学年高二上学期期中数学试题
名校
解题方法
2 . 曲线
上存在两点A,B到直线
到距离等于到
的距离,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d49560ce5477d6061ff4c1834a9e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb70fdf064b9193e506ca43f4672af56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004cf3e8335136acc770de0c525cae47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/248f9bb8dd23ab0fa70e774678d91641.png)
A.12 | B.13 | C.14 | D.15 |
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2022-01-28更新
|
1696次组卷
|
7卷引用:四川省宜宾市2021-2022学年高二上学期期末数学理科试题
四川省宜宾市2021-2022学年高二上学期期末数学理科试题(已下线)解密17 圆与方程 (讲义)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)江苏省镇江第一中学2021-2022学年高二下学期期中数学试题江苏省南京市、镇江市部分名校2021-2022学年高二下学期期中数学试题(已下线)专题35 圆的方程-2(已下线)专题9-4 抛物线性质应用归类-1(已下线)3.3.2 抛物线的几何性质(难点)-2022-2023学年高二数学《基础·重点·难点 》全面题型高分突破(苏教版2019选择性必修第一册)
名校
3 . 关于下列命题,正确的个数是( )
(1)若点
在圆
外,则
或
;
(2)已知圆
,直线
,则直线与圆恒相切;
(3)已知点
是直线
上一动点,
、
是圆
的两条切线,
、
是切点,则四边形
的最小面积是
;
(4)设直线系
,
中的直线所能围成的正三角形面积都等于
.
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d2ff9ced79c22ff48de8357b806412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abce3218e8541bda1981f4e84c1d8842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a9589f30699d1a766f1e700cc88a344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed1153940c7240fb5aa358a9dc7ba09.png)
(2)已知圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b246d32f2c0e334968e3d610a68dc08e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ce1369b877ab954121015ffa229f3e.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/425209ad4b273bf3eee80441e06030c6.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/283b0cef5d644b8dceb910ce2c76f21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(4)设直线系
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a828c16045c333c1422c646bf01f21b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e7dc603317eb90974c75efec9f02b1b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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4 . 已知曲线
:
,
为坐标原点.
(1)当
为何值时,曲线
表示圆;
(2)若曲线
与直线
交于
两点,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3eaf44e8fac880eec239aa55846f767.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b818e1793be8d9213e903e5224987a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c0b06dc01c30d13f64be2ac6a1d811e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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