题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-63304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-22596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-68331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-13451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-80612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-90077.png)
(1)若命题
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-63304.png)
(2)若命题
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-63304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-13451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-46842.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-77026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-42941.png)
解析
试题分析:(1)命题
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-63304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-34297.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-63304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-80612.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-13451.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-80612.png)
试题解析:(1)∵方程
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-22596.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-92347.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-48645.png)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-77026.png)
(2)∵命题
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142941-63304.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-13451.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142942-77026.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-87892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-89287.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142944-31630.png)
法一:因方程
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-87892.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142944-76257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142944-66286.png)
故只需
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-42941.png)
法二:令
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142944-59254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142945-87240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142945-87026.png)
解得:
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142943-42941.png)
核心考点
试题【已知命题:方程所表示的曲线为焦点在轴上的椭圆;命题:实数满足不等式.(1)若命题为真,求实数的取值范围;(2)若命题是命题的充分不必要条件,求实数的取值范围.】;主要考察你对椭圆的定义与方程等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142924-56069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142924-50634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142924-70063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142924-13774.png)
(1)求椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142924-51866.png)
(2)若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142925-37355.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142924-51866.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142925-36232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142925-79771.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142925-76016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142926-89233.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142926-11551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142917-78373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142917-33517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142918-91752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142918-16423.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142918-91752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142906-48686.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142907-98701.png)
(1)求椭圆Γ的方程;
(2)是否存在圆心在原点的圆,使得该圆的任意一条切线与椭圆Γ恒有两个交点P,Q,且
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142907-27787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142907-77598.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142857-24361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142857-85437.png)
A.锐角三角形 | B.直角三角形 |
C.钝角三角形 | D.锐角或钝角三角形 |
![](http://img.shitiku.com.cn/uploads/allimg/20191023/20191023142849-48721.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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