已知点
在圆
上运动,过点
作
轴,垂足为
,点
在线段
上,且满足
.
(1)求点
的轨迹方程;
(2)若存在一点
,直线
经过点
且与曲线
交于
、
两点当直线
的斜率为
时,求线段
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a81f14a75a6ab7fbf82312da4512f5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2634263d383b0487281fdcf6fe3cc625.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa284b73e21bdfa1471bfb1d698c880.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若存在一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcb1f56ec0288bd506efe9d7659db9a.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/ac047e91852b91af639feec23a9598b2.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
更新时间:2020-12-27 17:10:02
|
相似题推荐
【推荐1】已知点E、F的坐标分别为
、
,直线EP和FP相交于点P,且它们的斜率之积为
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(1)求动点P的轨迹C的方程;
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(3)设过点M与x轴垂直的直线为l,轨迹C上任一点N到点G的距离与点N到直线l的距离之比是否是定值?若为定值,求出这个定值;若不是定值,说明理由.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
(1)求动点P的轨迹C的方程;
(2)过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa40e4f5798e42c5b71a5bb2abc7bcf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4b0c4b339f44bbac0e275eb0718234.png)
(3)设过点M与x轴垂直的直线为l,轨迹C上任一点N到点G的距离与点N到直线l的距离之比是否是定值?若为定值,求出这个定值;若不是定值,说明理由.
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解题方法
【推荐2】在平面直角坐标系
中,已知点
,点
满足
,记
的轨迹为曲线
.
(1)求曲线
的方程;
(2)已知点
为曲线
上的动点,当
取得最大值时,求出此最大值及点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5439f5ff9bd5deec0f0ef35c6f605b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eed5b1b5a80e66f5a6cd08be019376c.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)已知点
![](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/c9220da190bfdf224835dbf277efa99a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
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【推荐1】如图,已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
过点
两个焦点为
和
.圆O的方程为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4c46b91a-1558-43cf-97ad-c54216ac4c88.png?resizew=169)
(1)求椭圆C的标准方程;
(2)过
且斜率为
的动直线l与椭圆C交于A、B两点,与圆O交于P、Q两点(点A、P在x轴上方),当![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e58139c6e7789fcc352a5410dd6502c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/461b248c0e101f7b92a273a5b9207ce3.png)
成等差数列时,求弦PQ的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2de52259b426acb42761fec59a7748.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d6f746c2355072d914591bf60c3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4be819fc47b2aa19ab2022b3dfeb6f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/4c46b91a-1558-43cf-97ad-c54216ac4c88.png?resizew=169)
(1)求椭圆C的标准方程;
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/893d4e8d70ea2c716ac7b6c1777a77f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e58139c6e7789fcc352a5410dd6502c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/461b248c0e101f7b92a273a5b9207ce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
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【推荐2】已知椭圆
的左、右焦点分别是
,
,抛物线
的准线过点
,且C2的准线与
交于M
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/c260982f-ca65-44c8-ae1e-f853b16099ae.png?resizew=179)
(1)求
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于A,B,交
于C,D,O为坐标原点,记△OAB,△F1CD的面积分别是
,
,且
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd486b8796b3454eab219c28ed131683.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/0987dd769fd2cc355b1c1c8d625c64a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f753791f2163669b2cfd6316cbcc8c30.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/11/c260982f-ca65-44c8-ae1e-f853b16099ae.png?resizew=179)
(1)求
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(2)如图,过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/7d07ea085e190bed813860d492292efb.png)
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