题目
题型:解答题难度:一般来源:不详
小题1:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102419-35305.png)
小题2:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102419-64870.png)
小题3:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102419-17971.png)
小题4:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-31227.png)
小题5:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-55868.png)
小题6:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-29618.png)
答案
小题1:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-41322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-86494.png)
小题2:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-52808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-62909.png)
小题3:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-66869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-48343.png)
小题4:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-13199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-71847.png)
小题5:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-14098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-35394.png)
小题6:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-55759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-54261.png)
解析
(1)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102419-35305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102423-62287.png)
得:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-41322.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-86494.png)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102419-64870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102423-24460.png)
得:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-52808.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-62909.png)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102419-17971.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102423-91455.png)
得;
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-66869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-48343.png)
(4)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-31227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102423-65975.png)
得:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102421-13199.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-71847.png)
(5)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-55868.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102423-23844.png)
得
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-14098.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-35394.png)
(6)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102420-29618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102424-67736.png)
得:
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-55759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102422-54261.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102320-13511.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102320-84867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102304-79124.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102300-68671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102245-15688.png)
小题1:求证:方程有两个不相等的实数根;
小题2:当
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102245-82426.png)
小题3:若方程的一个根是
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102245-54647.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102246-84121.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190823/20190823102118-56288.gif)
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