已知F是抛物线C:y2=2px(p>0)的焦点,点M(x0,4)在抛物线上,且|MF|=
x0.
(1)求抛物线C的标准方程;
(2)若A,B是抛物线C上的两个动点,且OA⊥OB,O为坐标原点,求证:直线AB过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
(1)求抛物线C的标准方程;
(2)若A,B是抛物线C上的两个动点,且OA⊥OB,O为坐标原点,求证:直线AB过定点.
2022高三·全国·专题练习 查看更多[2]
更新时间:2021-12-07 08:50:21
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【推荐1】在平面直角坐标系xOy中,抛物线C:x2=2py(p>0)的焦点为F,点A在C上,若|AO|=|AF|=
.
(1)求抛物线C的方程;
(2)设直线l与C交于P,Q,若线段PQ的中点的纵坐标为1,求△OPQ的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求抛物线C的方程;
(2)设直线l与C交于P,Q,若线段PQ的中点的纵坐标为1,求△OPQ的面积的最大值.
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【推荐2】已知抛物线
的焦点为
,
为抛物线
上的点,且
.
(1)求抛物线
的方程;
(2)若直线
与抛物线
相交于
,
两点,求弦长
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df40ba57bb5819b4aaa38d514500052.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e899f8b919e2104b26cddb012a8460.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b2153a01730ad91608bfec75fd6be99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐1】已知点
为抛物线
上一点,F为
的焦点,A、B是C上两个动点.
(1)直线
经过点F时,求
的最小值.
(2)若直线
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的倾斜角互补,
与C的另一个交点为A,求直线
的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706e0350fd1c36a4e3c66868a8218a7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】已知抛物线
,
是坐标原点,点
是抛物线上一点(与坐标原点
不重合),圆
是以线段
为直径的圆.
(1)若点
坐标为
,求抛物线
方程以及圆
方程;
(2)若
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为直径的圆
与抛物线
交于点
(与点
不重合),求圆
面积
的最小值.
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(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4ca651bfc89628a3b05c6e87ce5d6f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f970f380a12c843bb4a74ff34a15b2ac.png)
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【推荐1】已知A,B在抛物线
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【推荐2】已知抛物线
过点
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作直线
和
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交C于M,N两点,
交C于P,Q两点,M,P位于x轴的同侧,Q,N位于x轴的同侧,求直线MP与直线QN交点的轨迹方程.
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2e777b4aff3947a88d4abd38aec634f.png)
(2)过点
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