【题文】(本小题10分)若,求实数的值.
题型:难度:来源:
【题文】(本小题10分)
若
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035736-79722.png)
,求实数
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035736-33346.png)
的值.
答案
【答案】
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035737-70151.png)
或
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035738-71187.png)
.
解析
【解析】
试题分析:首先直接由元素与集合的关系,知
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035738-86730.png)
或
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035738-41228.png)
,即可计算出实数
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035736-33346.png)
的值;然后由集合的确定性、互异性、无序性,分别验证所求的
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035736-33346.png)
的值是否符合要求即可得出答案.
试题解析:
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035739-86312.png)
或
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035739-69832.png)
或
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035738-71187.png)
.
当
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035737-70151.png)
时,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035740-37931.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035740-68696.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035740-97077.png)
,适合条件;当
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035738-71187.png)
时,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035741-96106.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035738-41228.png)
,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035741-51042.png)
,适合条件.从而,
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035737-70151.png)
或
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035738-71187.png)
.
考点:元素与集合的基本关系.
举一反三
【题文】下列各组对象中不能形成集合的是( )
A.高一数学课本中较难的题 |
B.高二(2)班学生家长全体 |
C.高三年级开设的所有课程 |
D.高一(12)班个子高于1.7m的学生 |
【题文】下列关系中正确的个数为( )
①0∈{0},②Φ
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035611-33551.jpg)
{0},③
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035611-85735.png)
,④{(a,b)}={(b,a)}
【题文】已知A={1,a},则下列不正确的是( )
【题文】如果集合
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035544-22205.png)
,那么( )
【题文】设集合
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035452-15786.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20200314/20200314035452-58183.png)
中的元素个数为
最新试题
热门考点