高等数学一章极限、连续第三节连续章节练习(1)
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11、
( )
A. 充分非必要条件
B. 必要非充分条件
C. 充分必要条件
D. 无关条件
12、设二元函数z=xy,则点Po(0,0)( )
A. 为z的驻点,但不为极值点
B. 为z的驻点,且为极大值点
C. 为z的驻点,且为极小值点
D. 不为z的驻点,也不为极值点
13、 设f(x,y)为连续函数,
( )
A.![](//wximg.233.com/attached/image/20120918/20120918172575137513.jpg)
B.![](//wximg.233.com/attached/image/20120918/20120918172545354535.jpg)
C.![](//wximg.233.com/attached/image/20120918/20120918172530713071.jpg)
D.![](//wximg.233.com/attached/image/20120918/20120918172589348934.jpg)
14、
( )
A. 3
B. 2
C. 1
D. 0
15、
( )
A. 高阶无穷小
B. 同阶但不等价无穷小
C. 等价无穷小
D. 低阶无穷小
16、
( )
A.![](//wximg.233.com/attached/image/20120919/20120919170274097409.jpg)
B.![](//wximg.233.com/attached/image/20120919/2012091917020478478.jpg)
C.![](//wximg.233.com/attached/image/20120919/20120919170284098409.jpg)
D.![](//wximg.233.com/attached/image/20120919/20120919171379587958.jpg)
17、
则f(x)间断点是x=( )
A. 2
B. 1
C. 0
D. -1
解答题
18、设函数
![](//wximg.233.com/attached/image/20130108/20130108144614211421.jpg)
问k为何值时,函数f(x)其定义域内连续?
19、![](//wximg.233.com/attached/image/20130108/2013010814470576576.jpg)
20、![](//wximg.233.com/attached/image/20130108/20130108144858225822.jpg)
![](http://wximg.233.com/attached/image/20120919/20120919170263286328.jpg)
A. 充分非必要条件
B. 必要非充分条件
C. 充分必要条件
D. 无关条件
12、设二元函数z=xy,则点Po(0,0)( )
A. 为z的驻点,但不为极值点
B. 为z的驻点,且为极大值点
C. 为z的驻点,且为极小值点
D. 不为z的驻点,也不为极值点
13、 设f(x,y)为连续函数,
![](http://wximg.233.com/attached/image/20120918/20120918172516161616.jpg)
A.
![](http://wximg.233.com/attached/image/20120918/20120918172575137513.jpg)
B.
![](http://wximg.233.com/attached/image/20120918/20120918172545354535.jpg)
C.
![](http://wximg.233.com/attached/image/20120918/20120918172530713071.jpg)
D.
![](http://wximg.233.com/attached/image/20120918/20120918172589348934.jpg)
14、
![](http://wximg.233.com/attached/image/20120929/20120929150896609660.jpg)
A. 3
B. 2
C. 1
D. 0
15、
![](http://wximg.233.com/attached/image/20120925/20120925165360496049.jpg)
A. 高阶无穷小
B. 同阶但不等价无穷小
C. 等价无穷小
D. 低阶无穷小
16、
![](http://wximg.233.com/attached/image/20120919/20120919170266706670.jpg)
A.
![](http://wximg.233.com/attached/image/20120919/20120919170274097409.jpg)
B.
![](http://wximg.233.com/attached/image/20120919/2012091917020478478.jpg)
C.
![](http://wximg.233.com/attached/image/20120919/20120919170284098409.jpg)
D.
![](http://wximg.233.com/attached/image/20120919/20120919171379587958.jpg)
17、
![](http://wximg.233.com/attached/image/20120918/20120918172261356135.jpg)
A. 2
B. 1
C. 0
D. -1
解答题
18、设函数
![](http://wximg.233.com/attached/image/20130108/20130108144614211421.jpg)
问k为何值时,函数f(x)其定义域内连续?
19、
![](http://wximg.233.com/attached/image/20130108/2013010814470576576.jpg)
20、
![](http://wximg.233.com/attached/image/20130108/20130108144858225822.jpg)