题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140101-34250.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140101-16295.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140101-88232.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140101-44042.gif)
A.6![]() | B.8 | C.15 | D.10 |
答案
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140049-40691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140049-96038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140049-73953.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-47909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140049-40691.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-47909.png)
(I)求圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-47909.png)
(II)设圆
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-93103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-71799.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-93103.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-65702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-47909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140050-27682.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140051-74196.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140051-61709.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140030-33502.png)
A.相交 | B.相切 |
C.相离 | D.以上答案均有可能 |
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140011-94648.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140012-93535.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140012-11591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140012-24667.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140013-15130.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140013-79734.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140013-94901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140013-52559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025140012-11591.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135941-95564.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135942-64223.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135942-40237.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135942-57867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135942-40807.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135942-24468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135943-87078.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135943-87620.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135943-44504.png)
(1) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135943-84507.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135944-31254.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135944-92410.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135944-23714.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135944-42497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135945-48368.png)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135945-26625.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135945-11261.png)
求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135945-52663.png)
(3) 当
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135945-26625.png)
“若
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135945-52663.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135945-11261.png)
开展了研究并发现其为假命题.
请你就此从以下三个研究方向中任选一个开展研究:
① 试构造一个说明该逆命题确实是假命题的反例(本研究方向最高得4分);
② 对任意给定的大于3的正整数
![](http://img.shitiku.com.cn/uploads/allimg/20191025/20191025135943-87078.png)
③ 如果补充一个条件后能使该逆命题为真,请写出你认为需要补充的一个条件,并说明加上该条件后,能使该逆命题为真命题的理由(本研究方向最高得10分).
【评分说明】本小题若填空不止一个研究方向,则以实得分最高的一个研究方向的得分作为本小题的最终得分.
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