如图,抛物线
上的点
到其准线的距离为2.过点
作直线
交抛物线于
,
两点,直线
与直线
交于点
.
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953110839042048/2953567088091136/STEM/ae245dca822a43ceb4ae4bef45a857b7.png?resizew=248)
(1)求证:直线
轴;
(2)记
,
的面积分别为
,
.若
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3764ba3aa0a241787f4661026bb14053.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394f51b5517288305bc979f2667cbc83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/407417c2fd059a0cbb54f27edb8876bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c608def11fa0e2b34f05592ef1d11fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2022/4/7/2953110839042048/2953567088091136/STEM/ae245dca822a43ceb4ae4bef45a857b7.png?resizew=248)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5bdae58b98d168a3710c1be3f3323e.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8700271d6d859c1e761ce08f04c98dac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
2022·浙江·二模 查看更多[2]
更新时间:2022-04-08 08:30:32
|
相似题推荐
解答题-问答题
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适中
(0.65)
解题方法
【推荐1】已知抛物线
的焦点为F,点
在抛物线C上,
.
(1)求抛物线C的方程;
(2)直线 l 过点F且交抛物线于A、B两点,若
的面积为
(其中O为坐标原点),求直线 l 的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7251452d9c6c09b409f734cc48f4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1584d07b1e2ddc64349f0f5940f3a3e.png)
(1)求抛物线C的方程;
(2)直线 l 过点F且交抛物线于A、B两点,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
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解题方法
【推荐2】已知
为抛物线
上一点,点
到直线
的最小距离为
.
(Ⅰ)求抛物线C的方程;
(Ⅱ)过点(1,0)作两条互相垂直的直线
,与抛物线C分别交于
,求四边形
的面积
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04836ba2906cf6f1e9aecd2a00824aae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
(Ⅰ)求抛物线C的方程;
(Ⅱ)过点(1,0)作两条互相垂直的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50297ad9f7256b4d2efc3462289f18b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cd809a806eb730d1983a92592915a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945e93c9f3515ded840de09a9ba81ce8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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名校
【推荐1】设点
是抛物线外一点,过点
向拋物线
引两条切线TM,TN,切点分别为M,N,焦点
,
(1)若点
的坐标为
,证明:以TM为直径的圆过焦点;
(2)若点
的坐标为
,证明:
.
![](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/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e91676c7adfd65a76f56a0c1d4bbe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af0b2d49e1c706a9d29c4baef99aafa.png)
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解题方法
【推荐2】已知直线
和直线
.若拋物线
上的点到直线
和直线
的距离之和的最小值为2.
(1)求抛物线
的方程;
(2)若以拋物线上任意一点 M 为切点的直线
与直线
交于点 N,试问在 x 轴上是否存在定点 Q ,使 Q 点在以
为直径的圆上,若存在,求出点 Q 的坐标,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4e70ad712d8d6e2066e38093ad732e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3624ac3279fa0d23e45c6259f1864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9519d4102147bfaf794531815285c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若以拋物线上任意一点 M 为切点的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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