题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104209-67505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104209-21783.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104209-51964.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104209-67505.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104210-28313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104210-68880.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104210-78924.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104211-32419.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104211-12045.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104211-70130.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104209-67505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104211-14623.png)
试题分析:(1)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104211-20562.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104211-99713.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104212-42361.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104212-30588.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104212-55988.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104211-12045.png)
(2)∵
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104212-75099.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104212-86897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104213-22491.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104213-62802.png)
……12分
点评:用递推公式求数列的通项公式一般是构造新数列,用错位相减求和时一定要找准对应项,本题巧妙的把导数与数列结合,能拓展学生的思维.
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104152-42370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104153-40799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104153-88139.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104153-61064.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104153-48466.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104154-62302.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104154-36645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104154-15158.png)
(2)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104154-81520.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104154-97717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104138-85256.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104138-63424.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104138-41183.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104138-85256.png)
(2)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104138-85256.png)
(3)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104139-32428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104139-42574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104114-88655.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104114-58322.png)
(Ⅰ)试用含
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104115-32229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104115-24179.png)
(Ⅱ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104115-23600.png)
(Ⅲ)令
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104115-67523.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104115-23600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104115-17881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104116-88840.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104116-16792.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104115-23600.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104116-91902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104116-50992.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104105-28741.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104106-24795.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104054-26050.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104055-16933.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191018/20191018104055-98547.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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