已知点
,直线
和
交于点P,且它们的斜率之积为
.
(1)求点P的轨迹C的方程;
(2)过点
的直线
与C交于A,B两点,点
,求直线
与
的斜率之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b982e993589bd231b3e92db3c087ae68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
(1)求点P的轨迹C的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e36a0d9300ffafb296fab06732fda05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
22-23高二上·四川绵阳·期中 查看更多[2]
更新时间:2022-11-14 21:35:39
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【推荐1】已知
,动点
满足
,设动点
的轨迹为曲线
.
(1)求曲线
的方程;
(2)已知直线
与曲线
交于
两点,若点
,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a5d12bea78e1c2371b0daaef63af5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65def89ff160f27f7878dd71e4e16786.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e076cdcb2c2a2ec896e358e2cc7779.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/ab8b5a26bb4b7bc864ecf211a4da032b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e7b4277c0ea217f798ed99a4421e97.png)
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【推荐2】已知圆
:
,点
,C为圆
上任意一点,点P在直线
C上,且满足
,点P的轨迹为曲线E.
求曲线E的方程;
若直线l:
不与坐标轴重合
与曲线E交于M,N两点,O为坐标原点,设直线OM、ON的斜率分别为
、
,对任意的斜率k,若存在实数
,使得
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1726b15a51333bfaafb4f6f4a4e23cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90948188983ed685613d8089e8c7db52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93fd8f312d66092b44f2958545002229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1726b15a51333bfaafb4f6f4a4e23cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1726b15a51333bfaafb4f6f4a4e23cd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15fecf551ed63a960a72c5815712e8fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eda03a7a4f28f30e13fa7dc48c4b124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f375dc5addedc5f9fbb72d566939c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731f980ccb6f902d460d0ea2920bfe2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4611febd82f0bc5622c9b1b5e4b1f5ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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【推荐1】已知椭圆
:
的长轴长为
,离心率为
,过右焦点且与
轴不垂直的直线
与椭圆相交于A,B两点,点M的坐标为
,记直线
,
的斜率分别为
,
.
(1)求椭圆
的方程;
(2)当
时,求直线
的方程;
(3)求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.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/fad20e2bc6576fc461419f8f138d26e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5c62f22d7afc5627fcb86599faa8e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c11eedd93f473d8eed86155dc45154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b69e3f7ddd51215d00661c09cd900d60.png)
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解题方法
【推荐2】椭圆与双曲线之间有许多优美的对称性质,已知椭圆
和双曲线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64acf2cf103416ef9fdfbd01933f39c.png)
(1)设AB是双曲线
的不平行于对称轴且不过原点的弦,M为弦AB的中点,O为坐标原点,则
为定值.类比双曲线的性质:若AB是椭圆
的不平行于对称轴且不过原点的弦,M为AB的中点,O为坐标原点,试猜想
的值,并证明;
(2)设椭圆
交x轴于A,B两点,点P是椭圆
上异于A,B的任意一点,直线PA,PB分别交y轴于点M,N,则
为定值
,类比椭圆的性质:若双曲线
交x轴于A,B两点,点P是双曲线
上异于A,B的任意一点,直线PA,PB分别交y轴于点M,N,试猜想
的值,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd486b8796b3454eab219c28ed131683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64acf2cf103416ef9fdfbd01933f39c.png)
(1)设AB是双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64acf2cf103416ef9fdfbd01933f39c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60cc0c4657bd5897225c1ca6bacde6f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd486b8796b3454eab219c28ed131683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbb0fd0227d4a15ef7b215a08b9d54d.png)
(2)设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd486b8796b3454eab219c28ed131683.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f34bf09e464b2390c09fc5de83464b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfb0bbf86f8da2c412e3b3210aef356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64acf2cf103416ef9fdfbd01933f39c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8f34bf09e464b2390c09fc5de83464b.png)
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