题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024937-89613.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024937-23645.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024937-38171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-49354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-32409.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024937-38171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-58996.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-66581.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-32348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-81628.gif)
(I)求动点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-88632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-88088.gif)
(II)设圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-32631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-42182.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-32631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-88088.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-54498.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-32631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-32348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-32631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-12759.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-45384.jpg)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024937-38171.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-85306.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-48753.gif)
点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-58996.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-82833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-72214.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-82833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-72214.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-82833.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-27938.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-25820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-88632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024937-38171.gif)
∵点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-88632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-82833.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-63359.gif)
故动点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-88632.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024940-92360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024941-43695.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024937-38171.gif)
其方程为:
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024941-29205.gif)
(II)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024941-16810.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024939-32631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024938-32348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024941-54986.gif)
圆的半径
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024942-40387.gif)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024942-73433.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024942-18142.gif)
由(I)知
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024942-30001.gif)
所以
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024943-87079.gif)
解析
核心考点
试题【(本小题满分14分)在平面直角坐标系中,设点,直线:,点在直线上移动,是线段与轴的交点, .(I)求动点的轨迹的方程;(II)设圆过,且圆心在曲线上,是圆在轴上】;主要考察你对曲线与方程的应用等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024924-44712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024924-11459.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024925-99979.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024925-20933.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024925-91143.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024925-99979.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024925-97184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024926-93049.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024926-92627.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024926-61055.gif)
(I)求动点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024926-11524.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-87370.gif)
(II)设圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-43050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-55368.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-43050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-45997.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-87370.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-43050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-55368.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-43050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-87370.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-75690.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024928-10246.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-43050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024926-92627.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024927-43050.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024928-39699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024928-94906.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024915-47838.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024915-24836.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024909-53118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024910-94886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024910-82701.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024910-88956.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024910-34561.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024910-72597.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024910-80254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024910-78488.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-32610.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-82115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-64007.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-98656.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024856-13166.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024856-20698.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-64007.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024856-15999.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-64007.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024856-60790.gif)
(I)求
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024857-28887.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024857-14288.gif)
(II)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-98656.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-64007.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024857-66414.gif)
若存在,求出所有的P的坐标与
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024855-64007.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024849-25332.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026024849-81859.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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