题目
题型:不详难度:来源:
(本小题满分10分)
已知动圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-30665.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-76659.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-38101.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-77576.gif)
(1)求点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-30665.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-76062.gif)
(2)过点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-46572.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-76062.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-45213.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033239-76062.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-45213.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-10330.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-57684.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-33584.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-10986.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-22449.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-65382.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-36215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033240-21797.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-80833.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-89575.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-14553.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-14844.gif)
为
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-43327.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-27829.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-89911.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-18114.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033241-16098.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033242-49589.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033242-68771.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033242-54166.gif)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033242-96966.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033243-15327.gif)
解析
核心考点
试题【(本小题满分10分)已知动圆过点且与直线相切.(1)求点的轨迹的方程;(2)过点作一条直线交轨迹于两点,轨迹在两点处的切线相交于点,为线段的中点,求证:轴.】;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
已知点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033225-77751.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033225-12009.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033225-91173.gif)
(1)求动圆圆心的轨迹
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033225-14154.gif)
(2)设点
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033225-39638.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-97133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033225-14154.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-52213.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-97133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-25643.gif)
(3)在
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-58708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-51477.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-52136.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-94995.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-97133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033225-14154.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-99056.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033226-25643.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033227-26966.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033227-88825.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033227-63962.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033227-88825.gif)
已知椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033211-59799.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033211-97699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033211-85900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033211-28999.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-46365.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-84109.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-19591.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-44358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-44358.gif)
(1) 求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-46365.gif)
(2) 若圆
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-44358.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033212-56910.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033213-99402.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033213-18471.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033208-35221.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033208-88162.png)
A.椭圆 B.双曲线 C.抛物线 D.线段
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033205-73522.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033205-63349.png)
线有( )
A.1 条 | B.2条 | C.3条 | D.4条 |
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033157-33396.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033157-93717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033158-80334.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033158-27857.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033158-30113.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033158-52201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191026/20191026033159-50781.png)
A.![]() | B.1 | C.2 | D.不确定 |
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