如图,在平面直角坐标系
中,已知圆
及点
.在圆
上是否存在点
,使得
?若存在,求点
的个数,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77276d70a9e00ec4adb72b430985d888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0920e133f9cf69512ac1663f0eb7c8e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c9e13fd8d7227cdcd3a7dc025afa22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/d898ab98-f72a-42d2-8c68-8f48a101bc4f.png?resizew=265)
2022高三·全国·专题练习 查看更多[1]
(已下线)专题三 隐圆问题
更新时间:2022-08-30 14:37:33
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【推荐1】已知动点M在椭圆
上,过点M作y轴的垂线,垂足为N,点P满足
.
(1)求点P的轨迹方程E;
(2)已知点
,若直线
与P点轨迹交于G,H两点,证明:论k取何值时,直线AG和AH的斜率之积均是定值,并求出该定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a6e483672a226118dff5a39aa28449.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4681ae6c686fd0717767f9eb07879c34.png)
(1)求点P的轨迹方程E;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40630a669f4eedf626bc24851df10c85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8137b5a49ab40a9667fa24a0102b1b78.png)
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【推荐2】在平面直角坐标系xOy中,已知直线
和圆
,P是直线l上一点,过点P作圆O的两条切线,切点分别为M,N.
(1)若
,求点P坐标;
(2)若圆O上存在点A,B,使得
,求点P的横坐标的取值范围;
(3)设线段MN的中点为Q,l与x轴的交点为T,求线段TQ长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2924070a023138483fbbbf0ccaa73b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d3835e6398d18d162afebc92cd2ae9a.png)
(2)若圆O上存在点A,B,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15b82151bff7cc0238d2034a6129f0.png)
(3)设线段MN的中点为Q,l与x轴的交点为T,求线段TQ长的最大值.
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【推荐1】已知
的三个顶点
,
,
,其外接圆为圆
.
(1)求圆
的标准方程;
(2)对于线段
上的任意一点
,若在以
为圆心的圆上都存在不同的两点
,
,使得点
是线段
的中点,求圆
的半径
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8c59f28ff09ad1123be71defccf4c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02eba9f82ee5d4eda40a39f51cc39863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8813acd256e6138ebfe9dca5e36ad41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(1)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
(2)对于线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
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【推荐2】已知复数
,集合
,集合
,
(1)若
使得
(
为虚单位),求
的最小值;
(2)若当
时,集合
有两个子集.
①求
的取值范围;
②求集合
中复数
对应点
形成的复平面区域的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b51e2164fb8db54bbc974c937119f1d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a720a4f314efcf8aacedf407334197f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2129600c6623c8b81c47151440ea9ddd.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010e6bdfd73b146e42df3f899513183c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d5f6c6c2d42b75cffc3c4adcad1edc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)若当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ad053ae69ea1b0e01aa7e8a93aca3e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c450aa751cacd6442e82062d4b8b1e9.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c64b75adfa934653fb3447a898f3fde.png)
②求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8b9ad2fcfff3dd546c5fdbedfe6238.png)
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