已知
为抛物线
的焦点,
为坐标原点,
为
的准线
上的一点,线段
长度的最小值为
.
(1)求
的方程;
(2)过点
作一条直线
,交
于
,
两点,试问在准线
上是否存在定点
,使得直线
与
的斜率之和等于直线
斜率的平方?若存在,求出点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c023f4b501684abd869b36d6e6c7f21f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279563c3c055777ce1aa369a2ef54aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/360496a4f5cc8a5faca5e089ae4f9531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
更新时间:2024-01-03 21:16:12
|
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】已知
为抛物线
上一点,
是抛物线
的焦点,且
.
![](https://img.xkw.com/dksih/QBM/2021/2/6/2652034433630208/2653191971356672/STEM/33fd3a0394f449a189d1c161b05f7f85.png?resizew=265)
(1)求抛物线
的方程;
(2)过圆
上任意一点
,作抛物线
的两条切线
、
,与抛物线相切于点
、
,与
轴分别交与点
、
,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67bc51b970c4de4631cfae93b95cf08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02690b97ac3e14ef6ef5c9a90481782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3e9ee9ecec1650a86b25359972c6915.png)
![](https://img.xkw.com/dksih/QBM/2021/2/6/2652034433630208/2653191971356672/STEM/33fd3a0394f449a189d1c161b05f7f85.png?resizew=265)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed550179f5095a2cfd728c882f3ddbf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.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/81dea63b8ce3e51adf66cf7b9982a248.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/e53abbd672b82a02c4975f99fbbd2c37.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】已知抛物线
,抛物线上的点
到焦点的距离为2.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/2fd3f6eb-cb53-4ddb-a4b6-788d53688697.png?resizew=175)
(1)求抛物线的方程和
的值;
(2)如图,
是抛物线上的一点,过
作圆
的两条切线交
轴于
,
两点,若
的面积为
,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8516f71467b419293fa27df70bdaed74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5ab73897d6a3fb4d500d3e55944742.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/2fd3f6eb-cb53-4ddb-a4b6-788d53688697.png?resizew=175)
(1)求抛物线的方程和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefebc1e98817bfe7e835da7a1a0d6c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/c41663d9e5e18891475aeaa98794f33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e196d3c447cb1007ae8d0adcefb46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
【推荐1】已知抛物线
,过焦点的直线
与抛物线
交于两点A,
,当直线
的倾斜角为
时,
.
(1)求抛物线
的标准方程和准线方程;
(2)记
为坐标原点,直线
分别与直线
,
交于点
,
,求证:以
为直径的圆过定点,并求出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82796f5bb05438453a1e06a4fa83d6a1.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.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/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】已知抛物线
的焦点为F,设
为抛物线E上一点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/59ccea3a-b87f-4fad-b3e0-e5c4d61c2597.png?resizew=150)
(1)求抛物线E的方程:
(2)不与坐标轴垂直的直线与抛物线E交于A,B两点,与x轴交于点P,线段AB的垂直平分线与x轴交于Q点,若
,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f34256f2456f2a6e548257f81fe3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8707a9c14d07a366c912c54fe166c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1366961f17911da18a53c29ee9cc1ed2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/59ccea3a-b87f-4fad-b3e0-e5c4d61c2597.png?resizew=150)
(1)求抛物线E的方程:
(2)不与坐标轴垂直的直线与抛物线E交于A,B两点,与x轴交于点P,线段AB的垂直平分线与x轴交于Q点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1e82d67214f66f20a6657230ce1a652.png)
您最近一年使用:0次