名校
解题方法
1 . 已知圆
,点P为直线
上一动点,过点P向圆O引两条切线
,A,B为切点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc12c55f2676aeb4f696f4a84e4d65b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f6ef25fb9949607b3e25fb1b8fa426.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
A.![]() ![]() | B.![]() ![]() |
C.当![]() ![]() ![]() | D.定点![]() ![]() ![]() |
您最近一年使用:0次
2 . 已知圆
,点
是直线
上的动点,过点
作圆
的切线
,
,切点分别为
,
.
(1)当
时,求点
的坐标;
(2)设
的外接圆为圆
,当点
在直线
上运动时,圆
是否过定点(异于原点
)?若过定点,求出该定点的坐标;若不过定点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814364e874a81f19b4570df961b42df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c754c259d3ecab6546c3049223bd3b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77d02f0ec51f8f39037ab030e283c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次
2019-11-28更新
|
889次组卷
|
4卷引用:山西省太原市2019-2020学年高二上学期期中数学试题
山西省太原市2019-2020学年高二上学期期中数学试题山西省太原市第六十六中学2019-2020学年高二上学期期中数学试题(已下线)专题8-1 直线与圆归类(讲+练)-2(已下线)第08讲 2.4.2圆的一般方程(10 类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)
名校
3 . 已知点
.若曲线
上存在两点
,使
为正三角形,则称
为“正三角形”曲线.给定下列三条曲线:
①
;②
;③
.
其中,“正三角形”曲线的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0310ce4692c85c9702f564923a55f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/884d6f78a87c5cd33a53f0a75062803b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6b978d617f90da65594d97ce92419ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d0233228138beba93782fc2ad68269.png)
其中,“正三角形”曲线的个数是( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
2018-04-21更新
|
1083次组卷
|
4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(二)