如图,已知三点
在抛物线
上,点
关于
轴对称(点
在第一象限),直线
过抛物物线的焦点
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b6798ed0ff9c510c517a9f0f7577e5.png)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651385404825600/2653431744192512/STEM/970426d3bd14490ab9bf5197b6b61b26.png?resizew=265)
(1)求
的值;
(2)设
的面积分别为
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad74f90f6e6893d41d31b52407869da9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bdf80c34acd58735a861e1e6d91aa35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f54ea1c0c4903b3222aad364b52b5f15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715523a25a8f314db3fdcdf1ad956908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b6798ed0ff9c510c517a9f0f7577e5.png)
![](https://img.xkw.com/dksih/QBM/2021/2/5/2651385404825600/2653431744192512/STEM/970426d3bd14490ab9bf5197b6b61b26.png?resizew=265)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ceddc345bfa05b7c0c61ec02470188a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6e430eb21b9aa9c10895a62b7eaa2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be89b91f05f281190209b1e876299d57.png)
更新时间:2021-02-08 07:23:36
|
相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】已知抛物线
的焦点为F,过点F作垂直于x轴的直线与抛物线C交于M,N两点,
(O为坐标原点)的面积为
.
(1)求抛物线C的方程;
(2)过点P(2,0)的直线l与抛物线C交于A,B两点,x轴上是否存在点Q,使得直线AQ的斜率
与直线BQ的斜率
满足
,若存在,求出点Q坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4f02028a3847c4807c2d3cf0ea7efb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求抛物线C的方程;
(2)过点P(2,0)的直线l与抛物线C交于A,B两点,x轴上是否存在点Q,使得直线AQ的斜率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e29652da1247c6c90a5545b41327729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9165d7eeb96ed463c183b5316743595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae15f507430d4956d5ad434381cf97d5.png)
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解答题-证明题
|
适中
(0.65)
解题方法
【推荐2】已知抛物线
与垂直
轴的直线
相交于
两点,圆
分别与
轴正、负半轴相交于
,且直线
与
交于点
.
(1)求证:点
恒在抛物线上;
(2)求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac62b1ade07205ae2693ec1ab135def.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7f25834d8218c53cb975c2a2fe7442a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/affbbbc112ab58e6b7066ce1c7699db0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(1)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
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解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐1】已知点
,
其中
是曲线
上的两点,
,
两点在
轴上的射影分别为点
,
,且
.
(I)当点
的坐标为
时,求直线
的斜率;
(II)记
的面积为
,梯形
的面积为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a3efb79f35db8448f3391252ab7d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16d385d63224d39e086596fb73b3b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b6d1a3d50e7faaefc7017b2d6adbe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7afda28d212ddd2a4221cb35b7ddd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9e4f55c9c031c394638c238cdb05af2.png)
(I)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7a999c36de5c9a9ce876a4a56fa34c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(II)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2c435c25b3f3d3e6f73215fe2e9661a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/319ffc470b8504d1f6c332d661254af2.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】抛物线C:
的焦点为
,过点F的直线与C交于A,B两点,C的准线与x轴的交点为M,若
的面积为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092fd1b1d33979818300cd2e3699bff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37fbbc8f521edab89a7e373287bcfbd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d54cedbfc22f09a728b34ce129dbc46f.png)
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