已知圆F1:(x+1)2+y2=r2(1≤r≤3),圆F2:(x-1)2+y2= (4-r)2.
(1)证明:圆F1与圆F2有公共点,并求公共点的轨迹E的方程;
(2)已知点Q(m,0)(m<0),过点E斜率为k(k≠0)的直线与(Ⅰ)中轨迹E相交于M,N两点,记直线QM的斜率为k1,直线QN的斜率为k2,是否存在实数m使得k(k1+k2)为定值?若存在,求出m的值,若不存在,说明理由.
(1)证明:圆F1与圆F2有公共点,并求公共点的轨迹E的方程;
(2)已知点Q(m,0)(m<0),过点E斜率为k(k≠0)的直线与(Ⅰ)中轨迹E相交于M,N两点,记直线QM的斜率为k1,直线QN的斜率为k2,是否存在实数m使得k(k1+k2)为定值?若存在,求出m的值,若不存在,说明理由.
更新时间:2020-04-13 12:00:01
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相似题推荐
解答题-问答题
|
适中
(0.65)
解题方法
【推荐1】如图,已知点
,点
均在圆
上,且
,过点
作
的平行线分别交
,
于
两点.
![](https://img.xkw.com/dksih/QBM/2020/4/5/2435069797359616/2435691224522752/STEM/764ede8e31b44b249e5c47cbbcc67491.png?resizew=235)
(1)求点
的轨迹方程;
(2)过点
的动直线
与点
的轨迹交于
两点.问是否存在常数
,使得
点为定值?若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/996dadd8544543637bd2d32a1f79579e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be452c8bdea6b4e4c7a6d96e9dc6a51c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f9dc1bbc5193d7c1e6a2bc1f459990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9375fd78c0d2b63e1a5e34b5905d4b16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7272356beb98a7953a49651324cb6455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d8ad9e94d07405a6be585f81a0d623b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d567bdeba9b8e17d0911f594e141eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c0f067a2a348ceb24a408f82992eab8.png)
![](https://img.xkw.com/dksih/QBM/2020/4/5/2435069797359616/2435691224522752/STEM/764ede8e31b44b249e5c47cbbcc67491.png?resizew=235)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a2b8b43e1fe82fc439d145e91b860c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b22785de4fc33f48b075334551eb87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解答题-问答题
|
适中
(0.65)
【推荐2】已知圆
,动点
到圆心
的距离与到直线
的距离之比为
.动点
的轨迹为曲线
.
(1)求曲线
的方程.
(2)若直线
过曲线
的左焦点
,交圆
于
,
两点,交曲线
于
,
两点(
在
左边,
在
左边),且
,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea89febb93a7e7a635a0bdfa39563124.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.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/5963abe8f421bd99a2aaa94831a951e9.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d82164dedda7a8e62d353e2e05420d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐3】在平面直角坐标系
中,①已知点
,直线
,动点P满足到点Q的距离与到直线
的距离之比为
.②已知点
是圆
上一个动点,线段HG的垂直平分线交GE于P.③点
分别在
轴,y轴上运动,且
,动点P满足
.
(1)在①,②,③这三个条件中任选一个,求动点P的轨迹C的方程;
(注:如果选择多个条件分别解答,按第一个解答计分)
(2)设圆
上任意一点A处的切线交轨迹C于M,N两点,试判断以MN为直径的圆是否过定点?若过定点,求出该定点坐标.若不过定点,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/972cef3d3c6ff94cdc58ecaf9e2d7d5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b4bd11e0cee8930366898110d222cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68af022d7b0bbdd0597e7ce6251f7413.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d42c33a7a73cf62db85124edb35e496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fe7fd9b0c3c203a053a7ea52b71e7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a99e8a76fddaef080a96857d6df2a0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1354e337e9aef6a90ae478303282fc1.png)
(1)在①,②,③这三个条件中任选一个,求动点P的轨迹C的方程;
(注:如果选择多个条件分别解答,按第一个解答计分)
(2)设圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52b33328faae2d2d4921900e97424de5.png)
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在平面直角坐标系
中,椭圆
:
的离心率为
,焦点到相应准线的距离为
,
,
分别为椭圆的左顶点和下顶点,
为椭圆
上位于第一象限内的一点,
交
轴于点
,
交
轴于点
.
![](https://img.xkw.com/dksih/QBM/2018/7/4/1981271659053056/1982001044193280/STEM/f6ecd79a27584f829a17722f26d25948.png?resizew=244)
(1)求椭圆
的标准方程;
(2)若
,求
的值;
(3)求证:四边形
的面积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/2018/7/4/1981271659053056/1982001044193280/STEM/f6ecd79a27584f829a17722f26d25948.png?resizew=244)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d87e930abcc8c0ca4ee0d7f2da8e8b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/592cc9d735b0519cadec6d52da441c0a.png)
(3)求证:四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
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【推荐2】在平面直角坐标系
中,
是圆
上的动点,已知
,且线段
的垂直平分线交
于
,设
的轨迹为曲线
.
(1)求
的方程;
(2)设直线
与
交于
,
两点,若
,且
内切圆的圆心在直线
上,则直线
具备以下哪个性质?证明你的结论.
①
恒过定点,②
的斜率恒为定值,③
到
的距离恒为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f74b607dbfb111afec134114d7668a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055a2ef09e2ee0948cf67c58de58732d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3571241938380d9a52d5a50007564fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
①
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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