在平面直角坐标系xOy中,已知点
,
,点M满足
.记M的轨迹为C.
(1)求C的方程;
(2)设点P为x轴上的动点,经过
且不垂直于坐标轴的直线l与C交于A,B两点,且
,证明:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9bece414af7ecb2d796dc8a6f549e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e62a44b8712ce4483b8710cda0dc1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a4025eb237c7ade91051a786808c5f.png)
(1)求C的方程;
(2)设点P为x轴上的动点,经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f30acc34f4ee1077532ae6808af2ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527196b9b21259354db49d208e38ffec.png)
2022·河南安阳·模拟预测 查看更多[5]
河南省安阳市2022-2023学年高三上学期名校调研摸底考试文科数学试题河南省安阳市2022-2023学年高三上学期名校调研摸底考试理科数学试题(已下线)第32节 圆锥曲线中的定点定值问题(已下线)专题22 圆锥曲线中的定点、定值、定直线问题 微点4 圆锥曲线中的定点、定值、定直线综合训练(已下线)专题29 弦长问题及长度和、差、商、积问题-2
更新时间:2022-07-05 14:03:17
|
相似题推荐
【推荐1】设圆
的圆心为
,直线
过点
,
是圆
上的任意一点,线段
的垂直平分线与
交于
点.
(1)求出点
的轨迹方程;
(2)设点
的轨迹为曲线
,直线
交
于
,
两点,过
且与
垂直的直线与圆
交于
,
两点,求四边形
面积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714df7f0c804617e1c8832d2e91b496a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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名校
【推荐2】已知椭圆
的离心率为
,过其右焦点F且与x轴垂直的直线交椭圆C于P,Q两点,椭圆C的右顶点为R,且满足
.
(2)若斜率为k(其中
)的直线l过点F,且与椭圆交于点A,B,弦AB的中点为M,直线OM与椭圆交于点C,D,求四边形ACBD面积
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4329d5b051540ea56ab5b65c71ab2fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eff998d034284391ca064755fa6bf1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e31d9a9945ed374cf65a48238b239f.png)
(2)若斜率为k(其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bf4badc1b00534aefdc9508f8e6f636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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困难
(0.15)
解题方法
【推荐1】在直角坐标系
上取两个定点
,再取两个动点
,且
.
(1)求直线
与
交点的轨迹M的方程;
(2)已知点
是轨迹M上的定点,E,F是轨迹M上的两个动点,如果直线AE的斜率
与直线AF的斜率
满足
,试探究直线EF的斜率是否是定值?若是定值,求出这个定值,若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/728b3360d5c6394457b907f1cbc31a18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a461fda226f0bd4110de4dec466ab5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfb4d5fd550c84d02dd68e0b39b1b7c0.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a112d71e48de9093b85d248c6ee2ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d9474ef6e91a668a30481a7c9ca34f.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f32ef32dfc25c0432e5be48d2e7c372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff20ed0b3544f29756b858798054a3d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e54b9320227bac7e03eb44d06bf824ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1bcd06e9f4b4f8589391a55dad676f.png)
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(0.15)
【推荐2】已知点P是椭圆E:
+y2=1上的任意一点,F1,F2是它的两个焦点,O为坐标原点,动点Q满足
.
(1)求动点Q的轨迹方程;
(2)若已知点A(0,-2),过点A作直线l与椭圆E相交于B,C两点,求△OBC面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58af005618596c5263b725d1dd44d2d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9753fa160ccd0e5f5e9d88f08f133c.png)
(1)求动点Q的轨迹方程;
(2)若已知点A(0,-2),过点A作直线l与椭圆E相交于B,C两点,求△OBC面积的最大值.
您最近一年使用:0次
【推荐1】已知椭圆
的长轴为4,直线
与圆
相切于点
,与
相交于
,
两点,且
,
,
.
(1)记
的离心率为
,证明:
;
(2)若
轴右侧的点
在
上,且
轴,
,
是圆
的两条切线,切点分别为
,
(
在
上方),求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4966973694e3fdf6b63434b7bee5911.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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![](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/9fbd6303756adb878c1e028f511e51f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b32a5bdae1e1c0082553d71b80dbcd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6270bb08b90f72d5671ab8225f356c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fe3251e054fe97089806ba7033f802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a16563ac359fda8ac16989aa704b23.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af72fe2d8fdcd6793597db51d070290e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce2790947716b1cfa9c5e7a65db4093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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您最近一年使用:0次
【推荐2】已知中心在原点,焦点在
轴上的椭圆
的离心率为
,过左焦点
且垂直于
轴的直线交椭圆
于
两点,且
.
(Ⅰ)求
的方程;
(Ⅱ)若圆
上一点处的切线
交椭圆
于两不同点
,求弦长
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b5bc386a418430cdd7da1c9024405a.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac35b1e8a952aac4f4cdaaf02d868d04.png)
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解答题-问答题
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困难
(0.15)
名校
【推荐1】在平面直角坐标系xOy中,已知椭圆E:
(a>b>0)的离心率为
,且椭圆E的短轴的端点到焦点的距离等于2.
(1)求椭圆E的标准方程;
(2)已知A,B分别为椭圆E的左、右顶点,过x轴上一点P(异于原点)作斜率为k(k≠0)的直线l与椭圆E相交于C,D两点,且直线AC与BD相交于点Q.①若k=1,求线段CD中点横坐标的取值范围;②判断
是否为定值,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求椭圆E的标准方程;
(2)已知A,B分别为椭圆E的左、右顶点,过x轴上一点P(异于原点)作斜率为k(k≠0)的直线l与椭圆E相交于C,D两点,且直线AC与BD相交于点Q.①若k=1,求线段CD中点横坐标的取值范围;②判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a491401a0f279aca26def69f00076f.png)
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【推荐2】已知动圆
与圆
:
和圆
:
都内切,记动圆圆心
的轨迹为
.
(1)求
的方程;
(2)已知圆锥曲线具有如下性质:若圆锥曲线的方程为
,则曲线上一点
处的切线方程为:
.试运用该性质解决以下问题:点
为直线
上一点(
不在
轴上),过点
作
的两条切线
,
,切点分别为
,
.
(ⅰ)证明:
;
(ⅱ)点
关于
轴的对称点为
,直线
交
轴于点
,直线
交曲线
于
,
两点.记
,
的面积分别为
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36f49e116d037d0cf4187d9519ed877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e383fcc122f267043fbafe0972bfb900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(2)已知圆锥曲线具有如下性质:若圆锥曲线的方程为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/896f353fb463bb5bbfad2d94e8b04971.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23b4f86e48e2b0d63c1865c60ed1e4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1684f875065fa386c8254eac2e0a3875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3680f7d0d96efc5b207c8e9552e21c.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800c5e266b4ad8462a46970f0a232d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46b053f98b1d05a2043e94eeaefea87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
(ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9da27274e261b16a282f76b3c507a9d4.png)
(ⅱ)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ece94d77dd1437041d71dc299aa4ac3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff1e76eb77c8e916d82fe71183881066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccedd9e7b7f0e54838f58d984519cec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb4830f486b8576b67272d483bf9a87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11f4e000e3491c682b81692551ff9b82.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/a38c43d922840f5f7693007beeb62b34.png)
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