题目
题型:填空题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103224-23602.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103224-97691.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103225-66285.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103225-86683.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103225-49391.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103225-49391.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103225-31857.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103221-50811.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103221-15218.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103221-67824.jpg)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103220-96983.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103216-47974.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103216-65763.gif)
(1)若a=4,求
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103216-94574.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103216-38622.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103211-97934.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103212-22015.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103213-61749.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103209-75648.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103210-98073.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103210-71348.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190817/20190817103210-78537.gif)
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