名校
解题方法
1 . 不经过原点的直线
与椭圆
相交于
,
,线段
的中点为
,设直线
的斜率为
,直线
(
为原点)的斜率为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f4b244b3b0799cfb1994364036eb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4a949c00526fddf435423272cf10f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e2fd6df03fd6e945e2c1cb44bca014b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知
,
分别为椭圆
:
和双曲线
:
的离心率.
(1)若
,求
的渐近线方程;
(2)过
上的动点
作
的两条切线,经过两个切点的直线与
的两条渐近线围成三角形的面积为S,试判断S是否为定值?若是,请求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33558881906c228c262ff8024dcfc4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a33a99190a8fd29c36d5a002e3197cc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8becdb8fde8f3e400cfca21a9ab07aaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d79a9d7c59c061259eba07baded4941.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d5d4af8df621f4011f7a8d7dcf6257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/388c361a4c4f75d7dac75c730259b74d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
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3 . 若经过坐标原点O且互相垂直的两条直线
和
与圆
相交于A,C,B,D四点,则四边形
面积的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7754ea5f6847cf3176c46b32e12d9b44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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名校
解题方法
4 . 若直线
与
轴,
轴分别交于
,
两点,则线段
的垂直平分线方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056e249d0c33ef92b956f84937fa9324.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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5 . 过点
且和抛物线C:
有且仅有一个公共点的直线方程是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b25e326fdf9e5456f48e8a99a069f379.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
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6 . 1970年4月24日,我国发射了自己的第一颗人造地球卫星“东方红一号”,从此我国开始了人造卫星的新篇章.人造地球卫星绕地球运行遵循开普勒行星运动定律:卫星在以地球为焦点的椭圆轨道上绕地球运行时,其运行速度是变化的,速度的变化服从面积守恒规律,即卫星的向径(卫星与地球的连线)在相同的时间内扫过的面积相等.设椭圆的长轴长、焦距分别为2a,2c,下列结论错误的是( )
A.卫星向径的取值范围是![]() |
B.卫星在左半椭圆弧的运行时间大于其在右半椭圆弧的运行时间 |
C.卫星向径的最小值与最大值的比值越大,椭圆轨道越扁 |
D.卫星运行速度在近地点时最大,在远地点时最小 |
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7 . 设圆
:
,圆
:
,则圆
,
的位置关系是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/538a314a50df607633accbe9a2cb5fe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
A.内切 | B.外切 | C.相交 | D.相离 |
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8 . 已知
,
分别为椭圆E:
的左右焦点,其离心率
,O为坐标原点,过O作直线l交椭圆于A,B两点,
的面积最大值为
.
(1)求椭圆E的方程;
(2)若过点
的直线
交椭圆E于C,D两个不同的点,且
.求
的取值范围.
![](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/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6adbefade88c1539fc8d722725bf57ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c07ebcbfacda073208d483c58e8a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求椭圆E的方程;
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2348e3eb68118c6f7c6132c546525ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13dea1bd3d0dd84b8b6f6ff634c5600c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b7bac25e1444ef26341d98b0218e82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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9 . 已知抛物线C:
的焦点F到准线的距离为2.
(1)求C的方程;
(2)已知O为坐标原点,点P在C上,点Q满足
,求点Q的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
(1)求C的方程;
(2)已知O为坐标原点,点P在C上,点Q满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87219f74da690b082f554864d2694a4d.png)
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10 . 设A,B是焦点在x轴上椭圆C:
长轴的两个端点,若C上存在点M满足
,则m的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b354223236540ef0f3b1fbe9ddd9708.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0202ea05ad0138d2a406377296f6636.png)
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