题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232144-86003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232144-19686.png)
A.0 | B.![]() | C.2 | D.2![]() |
答案
解析
试题分析:把椭圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232145-18119.png)
椭圆的参数方程为:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232145-57636.png)
∴x+y=2cosθ+
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232146-52371.png)
∴(x+y)max=
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232146-40972.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232146-97520.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232146-42483.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232147-50369.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232147-97419.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232147-65611.png)
点评:本题考查数列的极限,椭圆的参数方程和最大值的求法,解题时要认真审题,注意三角函数知识的灵活运用
核心考点
试题【记椭圆围成的区域(含边界)为Ωn(n=1,2,…),当点(x,y)分别在Ω1,Ω2,…上时,x+y的最大值分别是M1,M2,…,则Mn=( )A.0B.C.2】;主要考察你对曲线与方程的应用等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232133-32345.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232134-55985.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232134-40266.png)
点。
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232134-42473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232134-70106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232134-42473.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232134-70106.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232135-75646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232135-61479.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232135-72095.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232135-55859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232136-19094.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232136-67704.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232136-23428.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232136-26592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232137-66805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232137-79754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232137-49171.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232121-92372.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232122-63541.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232122-81800.png)
A.![]() | B.![]() | C.![]() | D.![]() |
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232111-40767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232111-29991.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232111-99234.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232112-60999.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232112-53123.png)
① 直线 ② 椭圆 ③ 双曲线 ④ 抛物线 ⑤ 圆
A.①⑤ | B.③④⑤ | C.①②③⑤ | D.①②③④⑤ |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232102-29131.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232102-84621.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232102-99703.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232103-98206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232103-90178.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232103-12259.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232104-89517.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232103-98206.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232104-74335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025232104-66136.png)
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