已知抛物线
,M为直线
上任意一点,过点M作抛物线C的两条切线MA,MB,切点分别为A,B.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)当M的坐标为(0,-1)时,求过M,A,B三点的圆的方程;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(2)证明:以
为直径的圆恒过点M.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7ad3432ac96b0a38beaa7f2edc3499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42502a5730e1930d77d7100d1e34707.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(1)当M的坐标为(0,-1)时,求过M,A,B三点的圆的方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
(2)证明:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
更新时间:2019-06-04 23:35:39
|
相似题推荐
解答题-问答题
|
较易
(0.85)
【推荐1】过点
作抛物线
:
的两条切线,切点分别为A,B,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de78b493bc2cc9696c584325c22ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f4123c19136d3a4dc040dce8e34e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐2】已知函数
,当
,
时,求
在横坐标
处的切线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d90f2fb40fcb75b8be729f5aa945e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce4430b8b9b0c78de693513a7f88915.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐1】分别求满足下列条件的圆的标准方程:
(1)经过点
,圆心在
轴上;
(2)经过直线
与
的交点,圆心为点
.
(1)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a551d224cb643938282e03aa49ca7f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)经过直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9315b85140f138a28c6c9636a48bc441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bf4c5441af2933c5bd4422b3dfad28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f2b2e17012dad782bd12795cd27488.png)
您最近一年使用:0次
【推荐2】已知圆M过点
,
,
.
(1)求圆M的方程;
(2)求过点
的直线被圆M截得的弦长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e95e84f5c91c910aaafc5e74dbfbdf59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c77a42750684cb6157c2c7fb9422a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad388238efa6174e28af0ffa7fa4ce4.png)
(1)求圆M的方程;
(2)求过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08cec13dec8afb62deac170397efc604.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】抛物线
有一内接直角三角形,直角的顶点在原点,一直角边的方程是
,斜边长是
,求此抛物线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e38bd48c569e650474d63f1fb16125f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffa37aefb6d45efe4e20ba48c2e7dfa8.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】设抛物线
,点
,过点
的直线
与
交于
(
在
轴上方)两点.
(Ⅰ)当
时,求直线
的方程;
(Ⅱ)在
轴上是否存在点
,使得
,若存在,求
点出坐标,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa2c731aaa4005382d5b4324e29fbb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](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/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b34011fd033b15a4df4a6f77a7285381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(Ⅱ)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19d481634c7776f13a61184bd7f9666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐1】已知抛物线
:
的焦点为
,若过点F且斜率为1的直线与抛物线相交于M,N两点,且
.
(1)求抛物线C的方程;
(2)设直线l为抛物线C的切线,且
,求切线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/837ddcbaa6d5fe541fec04e9d6aee7c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/918557f3877399b64fcd259d1bc35637.png)
(1)求抛物线C的方程;
(2)设直线l为抛物线C的切线,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03df2b57fa4838034d1a1fd2c6035158.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】已知抛物线C:
过点
,焦点为F.
(1)求过点P的抛物线C的切线方程;
(2)从点F发出的光线经过点P被抛物线C反射,求反射光线所在的直线方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2719ce8a1c0aaa60da102db5712d63e3.png)
(1)求过点P的抛物线C的切线方程;
(2)从点F发出的光线经过点P被抛物线C反射,求反射光线所在的直线方程.
您最近一年使用:0次