已知圆
,线段
的一个端点
在圆
上运动,另一端点
.
(1)若线段
的中点为
,求点
的轨迹方程,并指出点
的轨迹是什么图形;
(2)设(1)中点
的轨迹为图形
,由图形
外一点
向该图形引一条切线,切点为
,
为坐标原点,且有
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f4e0c3d3e8132094273391d30c406be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/660f7b1d93e9f81edbc661284acdb944.png)
(1)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)设(1)中点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8979e9d9e479ed322c9f549ee35682.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17a92b933377ae3453fb36a171c521c7.png)
更新时间:2023-12-01 23:46:39
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系xOy中,过⊙T外一点P引它的两条切线,切点分别为M,N,若
,则称P为⊙T的环绕点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/2022b3ee-715d-4d98-8970-46fb7e804251.png?resizew=172)
(1)当⊙O半径为1时,
①在
中,⊙O的环绕点是 .
②直线y=2x+b与x轴交于点A,与y轴交于点B,若线段AB上存在⊙O的环绕点,求b的取值范围;
(2)⊙T的半径为1,圆心为(0,t),以
为圆心,
为半径的所有圆构成图形H,若在图形H上存在⊙T的环绕点,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35af0e33a8545858094b36ede9010d67.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/2022b3ee-715d-4d98-8970-46fb7e804251.png?resizew=172)
(1)当⊙O半径为1时,
①在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b858e63d98c4ba0512e3452844e7002.png)
②直线y=2x+b与x轴交于点A,与y轴交于点B,若线段AB上存在⊙O的环绕点,求b的取值范围;
(2)⊙T的半径为1,圆心为(0,t),以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d791da207624bd58969cdfba01e46e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c00653a92e7962ecc3a9cc1a4a49e8c.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】已知线段
的端点
,端点A在圆
上运动.
(1)点
在线段
上,且
,求点
的轨迹方程;
(2)若直线
与点
的轨迹相交,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/266c42a10c13c00114ae371b2d9f728d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed8a5cd9b5ea3091cc91bb5f7f8c88.png)
(1)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9edbf43917a21e2aca1aa8fb2c961d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/018d29fbd23afb4c465c9c5c8fd42eca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知
,过圆外一点
引圆的两条切线
,
,切点分别为
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ada25f76504c3fd1226da43c94cb4277.png)
(1)求
;
(2)直线
交
所得弦长为2,且分别交
轴、
轴于
,
,
,
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3564c62f91a58e7caf6a7397099ef9dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8196fd258ed7496efd965a480cb505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.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/ada25f76504c3fd1226da43c94cb4277.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
(2)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fddfb522b34cecadfb60ae77ea0496cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a981fb29b651cfdbd60c30b9781773c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd6f690253cb8ab25b4b1331fdb47eb.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】已知圆
:
(
为半径),圆
被
轴截得弦长为
,直线
:
(
),
为坐标原点.
(1)求圆的方程;
(2)若
,过直线
上一点
作圆
的切线
,
为切点,求切线长
最短时,点
的坐标;
(3)若直线
与圆
相交于
,
两点,且
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70f8b7806854b9e7d074167eb983625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df307146ad61d4bf105370f65a3e742c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求圆的方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0db2c49919467a2e14540f2aabd05cb.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d44e8bc37ed03f44470762748a8f942a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/5c0b06dc01c30d13f64be2ac6a1d811e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
【推荐2】在平面直角坐标系xOy中,过坐标原点O的圆M(圆心M在第一象限)的半径为2,且与y轴正半轴交于点
.
(1)求圆M的标准方程;
(2)设点B是直线
上的动点,BC,BD是圆M的两条切线,C,D为切点,求四边形BCMD面积的最小值;
(3)若过点M且垂直于y轴的直线与圆M交于点E,F,点P为直线
上的动点,直线PE,PF与圆M的另一个交点分别为G,H(GH与EF不重合),求证:直线GH过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0693b34e767ea963d4a75863c072d217.png)
(1)求圆M的标准方程;
(2)设点B是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e95b8f041a36f6995349bb0053dc9d0.png)
(3)若过点M且垂直于y轴的直线与圆M交于点E,F,点P为直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da322ac8867e8a47c6588601078abf18.png)
您最近一年使用:0次