题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-13431.png)
(1)求实数t的取值范围;
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-77218.png)
(3)过原点作两条相互垂直的直线分别交圆F于M、N、P、Q四点,求四边形
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-68670.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-92285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-28507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-88291.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-68670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-96672.png)
解析
试题分析:(1)利用一元二次方程根的判别式易求得结果;(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-75900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-75995.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171437-87189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171437-44065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-68670.png)
试题解析:(1)由已知
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171437-52774.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171437-91486.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-28507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-92285.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-28507.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-75900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171438-62868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171437-87189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171438-55525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171438-53890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171438-28027.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171438-29416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171439-64137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171439-31650.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-88291.png)
(3)如图:
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171439-32314.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171439-93237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-68670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171439-23204.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171440-31069.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171439-93237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171435-68670.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171436-96672.png)
核心考点
试题【已知二次函数与两坐标轴分别交于不同的三点A、B、C.(1)求实数t的取值范围;(2)当时,求经过A、B、C三点的圆F的方程;(3)过原点作两条相互垂直的直线分别】;主要考察你对函数的相关概念等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-20566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-48110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-34213.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-63645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-11225.png)
(1)判断
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-11225.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-48110.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-77267.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-48110.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171406-20566.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171407-35476.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171407-94754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171407-29890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171407-84524.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171347-44324.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171347-22657.png)
A.0 | B.1 | C.2 | D.3 |
①
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171333-44977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171333-94785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171334-26240.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171334-29396.png)
③
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171334-88257.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171334-77153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171334-38663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171335-24923.png)
A.①② | B.①③ | C.②④ | D.①④ |
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171300-72609.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171300-48073.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171234-46100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171234-91103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200204/20200204171235-68301.png)
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