题目
题型:单选题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083211-47065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083211-87360.png)
A.0和3 | B.1 | C.1和﹣2 | D.3 |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083211-47065.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083211-87360.png)
两边同时乘以(x-1)(x+2),原方程可化为x(x+2)-(x-1)(x+2)=m,整理得,m=x+2,
当x=1时,m=1+2=3;当x=-2时,m=-2+2=0.故选A.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083207-98929.png)
(1)解不等式
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083203-70578.png)
(2)解方程:
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083203-70821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083158-30900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083159-47075.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083156-30835.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083157-29934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20190820/20190820083157-31103.png)
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