线段
的长等于3,两端点
、
分别在
轴和
轴上滑动,点
在线段
上,且
,点
的轨迹为曲线
.求曲线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a573cc3f99b684f932c517bc822135d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
2021高三·全国·专题练习 查看更多[2]
更新时间:2021-10-27 17:50:12
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相似题推荐
解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】设
,
,
,
,且
,
.
(1)求
和
;
(2)求
在
方向上的投影;
(3)求
和
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2b77d2a272ae4e5013ed06594349edb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ab0a932ff8d53a6be79599d61b8b96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4765e0439c46160f11bbafbbd2a944.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9124894497367ec96874be124cbb844c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89356af29eb8d21e49d6a700914ebe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1eca315fcf4fa14e4a8eb2d0da6046.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524594bf0942ed86f56fc1eee120a81a.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/524594bf0942ed86f56fc1eee120a81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b5dc876d7dcd3c971b36d26668b1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345f310975ddb40dca94b5135c35dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d408c42f473d056b218c54d17026a9.png)
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名校
【推荐2】已知向量
,
,向量
.
(Ⅰ)若
,求
的值;
(Ⅱ)若
,求
,
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b195ebbc3f827355944bffe7e6b45f26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aa5abd1bd30045669bb6245db18bdcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9cf0c91d323a35144101eea242b770f.png)
(Ⅰ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/734a6a1d319648bb969845a9159cdba7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
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解答题-问答题
|
较易
(0.85)
解题方法
【推荐1】已知动点
与平面上两定点
,
连线的斜率的积为定值
.
(1)试求动点
的轨迹方程
;
(2)设直线
:
与曲线
交于
,
两点,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
(1)试求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](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/5ab466aedd6e176088d8dee7bc3e3aaa.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/084cf5ffced059f5653ee2a1023518b7.png)
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解题方法
【推荐2】设
,动圆
与
轴相切于
点,如图,过
两点分别作圆
的非
轴的两条切线,两条切线交点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/362848c8-c685-4089-89fa-f7e4bb4dc7a4.png?resizew=263)
(1)证明:
为定值,并写出点
的轨迹方程;
(2)设动直线
与圆
相切,又
与点
的轨迹交于
两点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/795cfa355eb3188f2d2a9b8909b02faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/362848c8-c685-4089-89fa-f7e4bb4dc7a4.png?resizew=263)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a3a530363f0113d0870aa6a65f50c3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)设动直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7db9b4ac9106bfaf32eba6ae265872b.png)
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