已知两定点
,
,过动点
的两直线
和
的斜率之积为
.设动点
的轨迹为
.
(1)求曲线
的方程;
(2)设
,过
的直线
交曲线
于
、
两点(不与
、
重合).设直线
与
的斜率分别为
,
,证明
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ef03f452410ab19c6246567c427178.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8671e4ccb0d0da8b6cf19b0669fe76d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9bece414af7ecb2d796dc8a6f549e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.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/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
更新时间:2023-11-29 23:28:10
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相似题推荐
解答题-证明题
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解题方法
【推荐1】动点M与定点
的距离和M到定直线
的距离之比是常数
.
(1)求动点M的轨迹G的方程;
(2)设O为原点,点
,过点A的直线l与M的轨迹G交于P、Q两点,且直线l与x轴不重合,直线
分别与y轴交于R、S两点,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3680f7d0d96efc5b207c8e9552e21c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(1)求动点M的轨迹G的方程;
(2)设O为原点,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8314b1fdf7dcef270ac0a2567609242.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1aaf5c27cab84ebf216ac14252083e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37aa696544881fcd3fe2d57106f51573.png)
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【推荐2】在直角坐标系xOy中,长为
+1的线段的两端点C,D分别在x轴、y轴上滑动,
.记点P的轨迹为曲线E.
(1)求曲线E的方程;
(2)经过点(0,1)作直线与曲线E相交于A,B两点,
,当点M在曲线E上时,求四边形AOBM的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccf6798555774141f4437f6ef5688a7a.png)
(1)求曲线E的方程;
(2)经过点(0,1)作直线与曲线E相交于A,B两点,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bb380097c89638d25c913c756383ac.png)
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【推荐1】已知
,
为椭圆C上两点,
为椭圆C的左焦点.
(1)求椭圆C的方程;
(2)设直线
与椭圆C有且仅有一个公共点,与直线
交于点M,与直线
交于点N,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed8be875c8d09bb747e4d95575bf97d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d78587da58e8dd460f83014389f046a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
(1)求椭圆C的方程;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffd51224ea09b9daf96602f94993ff87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6a9687221466a417cc70aa691a0487.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589760dbd8a79e3915da0ee98df41469.png)
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【推荐2】已知椭圆
过点
.
(1)求C的标准方程;
(2)若过点
且不与x轴垂直的直线
与C交于
两点,记C的上顶点为D,若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4a6c4a511060116fbfc081dbd12e60.png)
(1)求C的标准方程;
(2)若过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23a9301fc1ac223f9ddee3e918b4d882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0133b26e390fe11bc46a35e6b523b809.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd28cdb9f395d0506a50286f55f866d1.png)
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【推荐1】设椭圆
的左焦点为
,上顶点为
.已知椭圆的短轴长为4,离心率为
.
(1)求椭圆的方程;
(2)设点
在椭圆上,且异于椭圆的上、下顶点,点
为直线
与
轴的交点,点
在
轴的负半轴上.若
(
为原点),且
,求证:直线
的斜率与直线MN的斜率之积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
(1)求椭圆的方程;
(2)设点
![](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/d2be49c37e30a3ced0364c3e74d8c687.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f73f71443aa62f744cadb9c784379da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c922f835c095ce76ccef75e396b1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
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【推荐2】设
分别为椭圆
的左右两个焦点.
(1)若椭圆
上的点
到
两点的距离之和等于4,写出椭圆
的方程和焦点坐标;
(2)设点
是(1)中所得椭圆上的动点,求线段
的中点的轨迹方程;
(3)已知椭圆具有性质:如果
是椭圆
上关于原点对称的两个点,点
是椭圆上任意一点,当直线
的斜率都存在,并记为
时,那么
与
之积是与点
位置无关的定值,请给予证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
(1)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90064d012356de1877aa697cd6d6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0747fca9115a17ade8828d49fa27e0ce.png)
(3)已知椭圆具有性质:如果
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec8858389f4c3156a946ba8bf0d8a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9edfc4cbcb4bf112e806447c10a1b287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ddcc2a96195973e9cd1dda4246f2ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd63b865119ffb55d2725a4cbdc904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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【推荐1】如图,已知圆
,点
,以线段
为直径的圆内切于圆O,点
的集合记为曲线
.
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931154781757440/2934033573093376/STEM/2de6ee58-66fe-4024-976f-5fbca1cbbe6d.png?resizew=175)
(1)求曲线
的方程;
(2)已知直线
,
,过点
的直线
与
交于
两点,与直线
交于点
,记
的斜率分别为
,问:
是否为定值?若是,给出证明,并求出定值;若不是,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b47e7bf02b3ca16f7d96b9369e51a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931154781757440/2934033573093376/STEM/2de6ee58-66fe-4024-976f-5fbca1cbbe6d.png?resizew=175)
(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/495bb3e5a3a9d35f5c9f0cf1f5d51876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551dd5639ee27f89c0ee4e6ee960bec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3834d7ec7531f3c3c0ce9b286f7a49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9532b3531a979e4751b383a1d1d415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dca1726d463bd741c904abd9b6589056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1fde81e1a47912fd86075b5df4f4a7a.png)
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【推荐2】已知椭圆
的左焦点为
,过点
作一条斜率大于0的直线
与
交于不同的两点
、
,延长
交
于点
.
(1)求椭圆
的离心率;
(2)求证:点
与点
关于
轴对称.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98b13256966871698280885966815b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7637849048e371f7f7254544ef745623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79dbefeef8b858149bc3dcf7b2ebb133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.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/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edc7e2d4811f5ea6c01284cf00393a.png)
(2)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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