已知椭圆
的焦点与双曲线
的焦点相同,且D的离心率为
.
(1)求C与D的方程;
(2)若
,直线
与C交于A,B两点,且直线PA,PB的斜率都存在.
①求m的取值范围.
②试问这直线PA,PB的斜率之积是否为定值?若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88443cd69c1bd4462555de2713359cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c743ae98b9da87dfef89331a944ae750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
(1)求C与D的方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1b6f209d1a805437046ca6ef79dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01d7e7f0c9d22ae7edaeec1ee6bdfc6d.png)
①求m的取值范围.
②试问这直线PA,PB的斜率之积是否为定值?若是,求出该定值;若不是,请说明理由.
20-21高二下·陕西商洛·期末 查看更多[9]
陕西省商洛市2020-2021学年高二下学期期末理科数学试题陕西省商洛市2020-2021学年高二下学期期末文科数学试题贵州省黔西南州2020-2021学年高二下学期期末数学(理)试题(已下线)专题16 圆锥曲线常考题型04——定值问题-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)(已下线)卷07 圆锥曲线的方程——章节重难点突破卷-【重难点突破】2021-2022学年高二数学上册常考题专练(人教A版2019选择性必修第一册)云南省巍山彝族回族自治县第二中学2021-2022学年高二上学期第三次月考数学试题湖南省娄底市新化县2021-2022学年高二上学期期末数学试题(已下线)专题3.16 圆锥曲线中的定点、定值问题大题专项训练(30道)-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)(已下线)期末重难点突破专题02-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)
更新时间:2021-07-09 22:15:30
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相似题推荐
解答题-证明题
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较难
(0.4)
名校
解题方法
【推荐1】已知椭圆
的左右顶点分别为
,上顶点为
,离心率为
,
点
为椭圆
上异于
的两点,直线
相交于点
.
(Ⅰ)求椭圆
的方程;
(Ⅱ)若点
在直线
上,求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd72321801f7ce55ed0330289dd7c577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a03fb0c7ec9bf8580fa6d183ad0acad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.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/e6e4d7503a7d57ba242ad4e05c7006a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090c0ba4cadbd85bf1f04f0d962eb16a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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【推荐2】直角坐标系
中,曲线
与
轴负半轴交于点
,直线
与
相切于
,
为
上任意一点,
为
在
上的射影,
为
的中点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca23a2a8cf7f1022133ee825c7e12ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af8bd03f3dcb3d73acd61a08498de264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3056b51353f085f916bc6346cdbaa789.png)
(Ⅰ)求动点的轨迹
的方程;
(Ⅱ)轨迹与
轴交于
,点
为曲线
上的点,且
,
,试探究三角形
的面积是否为定值,若为定值,求出该值;若非定值,求其取值范围.
您最近一年使用:0次
【推荐1】已知双曲线
的左、右焦点分别为
,双曲线C的右顶点A在圆
上,且
.
(1)求双曲线C的标准方程;
(2)若过点
的直线l交双曲线C的右支于E,F两点,Q为x轴上一点,满足
;试问
是否为定值?若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd32b90b7f4918d1dcdb513a94e2f2e3.png)
(1)求双曲线C的标准方程;
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2e866eefdb38ad0b3a52ec90d0329b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9ef6c1350d532984159e7870a1b132.png)
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【推荐2】已知
为坐标原点,双曲线
的左,右焦点分别为
,
,离心率等于
,点
是双曲线
在第一象限上的点,直线
与
轴的交点为
,
的周长等于
,
.
(1)求
的方程;
(2)过圆
上一点
(
不在坐标轴上)作
的两条切线,对应的切点为
,
.证明:直线
与椭圆
相切于点
,且
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a2cfa22139b3e9c9a73500e1ba19f52.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/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fea5f7430235e65d2c2e6b2ecc46712.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09fe8586b7946329e275a23dcb6e4807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5efc375a54162552632a09ba57f75fe.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560adea7b0d4fbe4131fc41f3fcbd871.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9748cc7522cb42f7c083adcbd84a015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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解题方法
【推荐1】椭圆
:
的离心率
,短轴的两个端点分别为
、
(
位于
上方),焦点为
、
,四边形
的内切圆半径为
.
(1)求椭圆
的方程;
(2)过点
的直线
交
于M、N两点(M位于P与N之间),记
、
的面积分别为
、
,令
,
,求
的取值范围.
![](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/d5c7316976a221c051a2c14df80b1347.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.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/e694ed4fd4d76f641a4212908c0aa55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4faef322ba29bd150d511ea71c8b12a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111fd8671b64c9806d2f694e8cc3df04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8d05ac1c1dac22b6cfc0f94aabaf097.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/01d5be35473d180785dbbe4ddcde6d2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d43feb931ea47892fd2d4c66a7d31ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febf7413b35cf2889fdb57a6b519087c.png)
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名校
【推荐2】设椭圆
,点
为其右焦点,过点
的直线与椭圆
相交于点
,
.
![](https://img.xkw.com/dksih/QBM/2018/12/20/2100715681308672/2101571474366464/STEM/d0aa6406d8ef4bd19a5ae037b7c6108e.png?resizew=336)
(1)当点
在椭圆
上运动时,求线段
的中点
的轨迹方程;
(2)如图1,点
的坐标为
,若点
是点
关于
轴的对称点,求证:点
,
,
共线;
(3)如图2,点
是直线
上的任意一点,设直线
,
,
的斜率分别为
,
,
,求证
,
,
成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e759f106cb7761ca3128802223a77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://img.xkw.com/dksih/QBM/2018/12/20/2100715681308672/2101571474366464/STEM/d0aa6406d8ef4bd19a5ae037b7c6108e.png?resizew=336)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c2293f93791a597bf0162411f3395f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)如图1,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a812a9b58ccba331cfd21d244329af01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
(3)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdbd8a5d973b7a54b7605388fdcfbb07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d583183429b6b31aa9742eefc67d3181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ffda0c209f06e21770aeab0abc8cbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e4b0ddfa5aec71d6df83e574b56150.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a41083fa3ad6a465181aaae381c448b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3a6ee9ff60580111bb761e7147dafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53d245e279f0e4d50a5a6b83bd2510d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a41083fa3ad6a465181aaae381c448b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b3a6ee9ff60580111bb761e7147dafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53d245e279f0e4d50a5a6b83bd2510d.png)
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解题方法
【推荐1】在平面直角坐标系
中,椭圆
的右准线为直线
,动直线
交椭圆于
两点,线段
的中点为
,射线
分别交椭圆及直线
于点
,如图,当
两点分别是椭圆
的右顶点及上顶点时,点
的纵坐标为
(其中
为椭圆的离心率),且
.
![](https://img.xkw.com/dksih/QBM/2022/7/19/3026155684364288/3026529832312832/STEM/08d7828de4ee40d3b15e4ba1b73387df.png?resizew=264)
(1)求椭圆
的标准方程;
(2)如果
是
的等比中项,那么
是否为常数?若是,求出该常数;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577bd40a5ca10e6a5eb2f6d55df340e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49515457fb31d0b27d7f49a5de0ae160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1b15a4605fce993cb13aefbf40360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51186287f9286cd382f6bc96e7e27e73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d214c18e80d49d57bec976875f99673.png)
![](https://img.xkw.com/dksih/QBM/2022/7/19/3026155684364288/3026529832312832/STEM/08d7828de4ee40d3b15e4ba1b73387df.png?resizew=264)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e8c8cf8b4b722a8818bd99f21ec10c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87ad654af1892b69647b2350e8264f1d.png)
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解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐2】如图,已知:
为椭圆
长轴的两个端点,
是椭圆C上不同于A,B的一点,从原点O向圆
作两条切线分别交椭圆C于点M,N,记直线
的斜率分别为
,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/a15b4490-b2b7-4193-ab89-7b35a738cc61.png?resizew=194)
(1)若圆P与x轴相切于椭圆C的右焦点,求圆P的半径.
(2)若
,求半径r的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbec8b46231e412ddce55cc96634e182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596af38cf818a4e185d02d4d94f94312.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c5a4427833e5eb70892521503ea72a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c65902e35640cf2c8d4111c36b40145.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/a15b4490-b2b7-4193-ab89-7b35a738cc61.png?resizew=194)
(1)若圆P与x轴相切于椭圆C的右焦点,求圆P的半径.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19c0d7ea4f1696ad189baf8ea3d294e9.png)
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