题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044338-30133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044338-14347.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044338-51816.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044339-92642.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044339-50044.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044339-89590.gif)
(Ⅰ)判断数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044339-47324.gif)
(Ⅱ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044340-68478.gif)
(Ⅲ)求数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044340-82263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044340-56680.gif)
答案
(Ⅰ)数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044340-73321.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044340-95572.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044341-14682.gif)
(Ⅲ)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044341-67675.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044341-60059.gif)
解析
(Ⅰ)由
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044341-74156.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044342-77862.gif)
变形得:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044342-88332.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044342-36900.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044342-65451.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044340-73321.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044340-95572.gif)
(Ⅱ) 由(1)得:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044342-69834.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044343-12038.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044343-63637.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044341-14682.gif)
(Ⅲ)由(1)知:
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044343-24100.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044343-63637.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044341-67675.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044341-60059.gif)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044323-12699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044323-34891.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044324-68707.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044324-49657.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044324-49657.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044324-58723.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044324-38042.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044324-49174.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044325-27323.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044325-30688.gif)
(Ⅰ)求曲线C的方程;
(Ⅱ)试求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044325-24666.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044300-28761.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044300-56690.gif)
所表示的平面区域为
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044301-28659.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044301-28659.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044301-68258.gif)
(Ⅰ)求
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044301-23602.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044301-28810.gif)
(Ⅱ)设数列
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044301-62683.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044302-74071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044302-92975.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044302-14524.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044302-74071.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044302-62951.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044300-56690.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044302-11730.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044303-90631.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044252-48527.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044252-91947.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044253-15933.gif)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044246-99748.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044247-41464.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044247-25720.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191013/20191013044247-61174.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
A.4 | B.5 | C.6 | D.7 |
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