已知抛物线
的焦点为
,O为坐标原点.
(1)求抛物线方程;
(2)斜率为1的直线过点F,且与抛物线交于A,B两点,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14436636ec6a7aec09cb63cecf6e970d.png)
(1)求抛物线方程;
(2)斜率为1的直线过点F,且与抛物线交于A,B两点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
22-23高二上·吉林长春·期末 查看更多[4]
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更新时间:2023-01-14 09:08:22
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【推荐1】已知抛物线
,其焦点到准线的距离为
.
(1)求该抛物线的标准方程.
(2)过点
的直线交该抛物线于
两点,如果点
恰是线段
的中点,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
(1)求该抛物线的标准方程.
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e584f799ea554fc5533925ead4672501.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐2】已知抛物线
的顶点是双曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf1bce17440e83c1b735d2954010a2a.png)
的中心,而焦点是双曲线的左顶点,
(1)当
时,求抛物线
的方程;
(2)若双曲线的离心率
,求双曲线的渐近线方程和准线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cf1bce17440e83c1b735d2954010a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ddc136fd0dc1d93136e8bdbbb31918.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若双曲线的离心率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790f682ab3b50ba3f79e1ab6c67c75a5.png)
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【推荐1】已知抛物线
(
)的焦点F,E上一点
到焦点的距离为4.
(1)求抛物线E的方程;
(2)过F作直线l交抛物线E于A,B两点,若直线AB中点的纵坐标为
,求直线l的方程及弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0782718dd8b2e591ef21fc89d1af2fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5abd313d4e92a762fb7fb0c1cb65263d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb42f3166dffe832771208f032aa7687.png)
(1)求抛物线E的方程;
(2)过F作直线l交抛物线E于A,B两点,若直线AB中点的纵坐标为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
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【推荐2】已知抛物线
的方程为
,点
,过点
的直线交抛物线于
,
两点.
(1)
是否为定值?若是,求出该定值;若不是,说明理由;
(2)若点
是直线
上的动点,且
,求
面积的最小值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088fcdd595455906a1a7080d630611f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/621c69616941cc891f3ef9dae620058f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e442bca1d0300766d4d12c2dc7c75a27.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e199c5a860eae4217c9659b533527b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c9e6d4506b9ac289a1aa6c83c6127e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
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解题方法
【推荐1】已知抛物线
与双曲线
有共同的焦点.
(1)求
的方程;
(2)若直线
与抛物线
相交于
两点,过
两点分别作抛物线
的切线,两条切线相交于点
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ea1be9b9b6bb12afa7e1ce703d1603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208dd3b89c65173db21567ad1f97566b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2151695ca7377abd8f288e0e748fba22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a855335176fc36a15017f50a8561348.png)
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【推荐2】已知抛物线
的焦点为F,且F与圆
上点的距离的最大值为5.
(1)求抛物线C的方程;
(2)若点P在圆M上,PA,PB是抛物线C的两条切线,A,B是切点,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bf92a1ba410263d4f68b7e0432b19aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41926c467bcf2f64f02b7bb9780d978a.png)
(1)求抛物线C的方程;
(2)若点P在圆M上,PA,PB是抛物线C的两条切线,A,B是切点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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