题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191900-63375.gif)
(Ⅰ)求实数
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191900-43548.gif)
(Ⅱ)求二项展开式中含
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191900-52304.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191900-41805.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191901-87711.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191901-67251.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191901-87620.gif)
即
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191901-88264.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191900-41805.gif)
(Ⅱ)在通项中令
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191901-68531.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191902-47388.gif)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191902-39955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191902-25947.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191902-77977.gif)
若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191903-18595.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191902-25947.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191903-88123.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191852-88612.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191844-60543.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191845-99361.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191845-65332.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191845-98556.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191845-10411.gif)
A.1 | B.2 | C.4 | D.与![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191837-73298.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191838-88542.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191838-83938.jpg)
A.4 | B.3 | C.6 | D.7![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191831-47716.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191832-86090.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191832-93736.gif)
是 .
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191832-28798.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191821-62893.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020191821-92836.gif)
A.![]() | B.0 | C.1 | D.2 |
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