题目
题型:不详难度:来源:
(1) 化简:
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052020-49283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052021-72646.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052021-43493.png)
解析
试题分析:解:(1)原式=
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052021-50445.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052021-27875.png)
=
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052021-43493.png)
(2)原方程可化为:
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052022-10939.png)
解之得:
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052022-24239.png)
经检验
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052022-24239.png)
所以原方程无解。
点评:该题是常考题,较为简单,要求学生学会分式通分,解分式方程要注意最后需检验。
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052011-11299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052012-32843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052011-11299.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052012-62688.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122052012-74194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051954-21832.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051954-99525.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051954-46344.png)
①计算
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051955-26223.png)
②探究
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051955-57736.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051955-61463.png)
③若
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051955-10249.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051955-28665.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051955-61463.png)
A.![]() | B.![]() | C.-![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051937-98371.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051937-89924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051937-62189.png)
A.![]() | B.![]() | C.xy | D.1 |
![](http://img.shitiku.com.cn/uploads/allimg/20200122/20200122051904-13889.png)
A.扩大3倍 | B.缩小3倍 | C.不变 | D.扩大9倍 |
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