题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031653-14326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-79416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-58691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-58002.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-67648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-18448.png)
答案
解析
试题分析:由
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-49019.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-79239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031655-58915.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031655-53566.png)
由
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-79416.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031654-58691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031655-52942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031655-82937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-22588.png)
{
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-41051.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-44039.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-20441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-20901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-25906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-13711.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031657-82368.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031656-20441.png)
核心考点
试题【已知定义在R上的函数f(x),g(x)满足=ax,且f′(x)g(x)+f(x)·g′(x)<0,+=,若有穷数列{}(n∈N*)的前n项和等于,则n等于】;主要考察你对数列综合等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031640-24605.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031640-99406.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031640-57990.png)
(1)求通项
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031640-31865.png)
(2)若数列
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031641-93634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031641-15784.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031641-93634.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031641-84376.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031625-19716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031625-94873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031626-17785.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031626-23903.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031626-63082.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031625-19716.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031626-43848.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031627-68601.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031625-94873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031627-82703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031610-33085.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031611-39158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031611-96108.png)
(1)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031610-33085.png)
(2)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031611-11884.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031611-77185.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031611-87979.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031550-90313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031551-87470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031550-90313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031551-15886.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031530-43837.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031530-30755.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031530-48155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031531-93093.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191015/20191015031531-11367.png)
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