如图,已知椭圆
的左、右焦点分别为
,
,设
是第一象限内椭圆C上的一点,
的延长线分别交椭圆C于点
.当
时,
的面积为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/14/3e7a9c6a-f006-4dc1-9345-00c6fbff944f.png?resizew=227)
(1)求椭圆C的方程;
(2)分别记
和
的面积为
和
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b1a324748fa3786fa709db3b008e6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7775aa57ca0e62216f3039ed88dceed0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587662afaaecad25c6f5f9e5e7ff28b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e82e6b954de0e40f42c0bf5aab4777.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d124b231bf2cd3746f35e6c68cd7178f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18483c9c195ecd922772527fa85c0fcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/14/3e7a9c6a-f006-4dc1-9345-00c6fbff944f.png?resizew=227)
(1)求椭圆C的方程;
(2)分别记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/157a7b303876fefb5f4ba4e21d65bcf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f4dc2aa1aa394a5bb93df02aa0ed3c.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/16ae89bd2dd0a18e1afb5b1a1abd0efd.png)
2022·浙江湖州·模拟预测 查看更多[5]
更新时间:2022-06-13 22:15:42
|
相似题推荐
【推荐1】已知椭圆C的中心在原点O上,焦点在x轴上,离心率为
,且过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/6fe84e7a-5b95-436e-acd9-e41fbd1a0222.png?resizew=177)
(1)求椭圆C的方程;
(2)过该椭圆的右焦点F作直线l与椭圆C交于不同的两点A,B,设
,
,连接MA,MB,并以MA,MB为邻边作平行四边形MANB,若
,求此时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe8530b8e246a9a5ec9fe3b9c347d5a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/6fe84e7a-5b95-436e-acd9-e41fbd1a0222.png?resizew=177)
(1)求椭圆C的方程;
(2)过该椭圆的右焦点F作直线l与椭圆C交于不同的两点A,B,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d769677bd7a23a6d09d2a366d9dcc467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99296bab1b42898e7ca336a822510258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dc319636fdb5ed2084422885694dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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【推荐2】已知椭圆
和直线l:
,椭圆的离心率
,坐标原点到直线的距离为
.
(1)求椭圆的方程;
(2)已知定点
,若直线
与椭圆相交于C,D两点,试判断是否存在实数k,使以CD为直径的圆过定点E?若存在,求出k的值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d622330932e0700abced7a1a5cc1b2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/234e7679481ec0d01c915b7fbb71891d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆的方程;
(2)已知定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97fb96d52f1ab7cd9c4e9427838bd6e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0189d4c890b2f150fc4ab7664a86294c.png)
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【推荐1】已知抛物线C:
,直线
截抛物线C所得弦长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/b71bf385-10e0-46c2-b683-e19611d58519.png?resizew=125)
(1)求p的值;
(2)若直角三角形APB的三个顶点在抛物线C上,且直角顶点P的横坐标为1,过点A、B分别作抛物线C的切线,两切线相交于点Q.
①若直线AB经过点
,求点Q的纵坐标;
②求
的最大值及此时点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ea1ce7588f88b39746159233be9cd82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/13/b71bf385-10e0-46c2-b683-e19611d58519.png?resizew=125)
(1)求p的值;
(2)若直角三角形APB的三个顶点在抛物线C上,且直角顶点P的横坐标为1,过点A、B分别作抛物线C的切线,两切线相交于点Q.
①若直线AB经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fed700b7a3ab2ee7fbae12507033af9.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c97474e2b4212d3e534a0bb09b34d82.png)
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【推荐2】如图,已知直线
与抛物线
和圆
都相切,F是
的焦点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/b9056114-28f9-430d-ac4d-a6eb106a4db6.png?resizew=143)
(1)求m与a的值;
(2)设A是
上的一动点,以A为切点作抛物线
的切线
,直线
交y轴于点B,以
为邻边作平行四边形
,证明:点M在一条定直线上;
(3)在(2)的条件下,记点M所在的定直线为
,直线
与y轴的交点为N,连接
交抛物线
于
两点,求
的面积S的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91333381c13fc15114df61ad4143b7fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b6833c187958fd81a00fc33eb7b5d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611e141db6bd44e32d1a510549ea5255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/b9056114-28f9-430d-ac4d-a6eb106a4db6.png?resizew=143)
(1)求m与a的值;
(2)设A是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b05d2adf289a6f75d459d03c6f2159d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f98d8cf4f5eded4d4d058b6dd311a72f.png)
(3)在(2)的条件下,记点M所在的定直线为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dd8cb171425253834dfd7fa1a9da9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8428037a379bcd01cfffd5aa9434dc9.png)
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【推荐1】已知椭圆
的左、右焦点分别为
,
,
为椭圆上一动点,当
的面积最大时,其内切圆半径为
,椭圆
的左、右顶点分别为
,
,且
.
(1)求椭圆
的标准方程;
(2)过
的直线与椭圆相交于点
,
(不与顶点重合),过右顶点
分别作直线
,
与直线
相交于
,
两点,以
为直径的圆是否恒过某定点?若是,求出该定点坐标;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24ff410a277986fc6045c1cb36f89e34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd71f885f0349af6004844dc714297e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
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(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a089c207e39a24d0d82aa853ac2bbb8c.png)
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【推荐2】已知椭圆
的左、右焦点分别为
,离心率为
,过
且垂直于x轴的直线交椭圆于点
,且
.
(1)求椭圆C的标准方程;
(2)过
的直线l交椭圆C于
两点,若
内切圆的周长为
,求直线l的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192a35f0603f57bcc6ec1e75927ba916.png)
(1)求椭圆C的标准方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c07ebcbfacda073208d483c58e8a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e57d64df9b332d8496e58eafb7e2050e.png)
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