2012年成人高考《数学(理工农医类)高起点》冲刺试卷(3)
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11、
若函数f(x)=log2(5x+1),则其反函数y=f-1(x)的图像过点( )
A. (2,1)
B. (3,2)
C. (2,3)
D. (4,3)
12、 若a>b>0,则( )
A.![](//wximg.233.com/attached/image/20120913/20120913164637803780.jpg)
B.![](//wximg.233.com/attached/image/20120913/20120913164627352735.jpg)
C.![](//wximg.233.com/attached/image/20120913/20120913164661936193.jpg)
D.![](//wximg.233.com/attached/image/20120913/20120913164687648764.jpg)
13、
![](//wximg.233.com/attached/image/20120914/20120914154232053205.jpg)
A.![](//wximg.233.com/attached/image/20120914/20120914154295969596.jpg)
B.![](//wximg.233.com/attached/image/20120914/2012091415420208208.jpg)
C. 8
D. -8
14、
![](//wximg.233.com/attached/image/20120914/20120914152733373337.jpg)
A. 8
B.![](//wximg.233.com/attached/image/20120914/20120914152770757075.jpg)
C. 4
D.![](//wximg.233.com/attached/image/20120914/20120914152758325832.jpg)
15、![](//wximg.233.com/attached/image/20120914/20120914161936123612.jpg)
A. {x|0<x<1}
B. {x|-1<x<1}
C. {x|0<x<2}
D. {x|x>1}
16、![](//wximg.233.com/attached/image/20120913/20120913164660256025.jpg)
A.![](//wximg.233.com/attached/image/20120913/20120913164661166116.jpg)
B.![](//wximg.233.com/attached/image/20120913/20120913164625492549.jpg)
C. 2
D. -2
17、 已知平面向量a={3,x),b=-(-2,5),且a⊥b,则2=( )
![](//wximg.233.com/attached/image/20120914/2012091416090648648.jpg)
A. (2,1)
B. (3,2)
C. (2,3)
D. (4,3)
12、 若a>b>0,则( )
A.
![](http://wximg.233.com/attached/image/20120913/20120913164637803780.jpg)
B.
![](http://wximg.233.com/attached/image/20120913/20120913164627352735.jpg)
C.
![](http://wximg.233.com/attached/image/20120913/20120913164661936193.jpg)
D.
![](http://wximg.233.com/attached/image/20120913/20120913164687648764.jpg)
13、
![](http://wximg.233.com/attached/image/20120914/20120914154232053205.jpg)
A.
![](http://wximg.233.com/attached/image/20120914/20120914154295969596.jpg)
B.
![](http://wximg.233.com/attached/image/20120914/2012091415420208208.jpg)
C. 8
D. -8
14、
![](http://wximg.233.com/attached/image/20120914/20120914152733373337.jpg)
A. 8
B.
![](http://wximg.233.com/attached/image/20120914/20120914152770757075.jpg)
C. 4
D.
![](http://wximg.233.com/attached/image/20120914/20120914152758325832.jpg)
15、
![](http://wximg.233.com/attached/image/20120914/20120914161936123612.jpg)
A. {x|0<x<1}
B. {x|-1<x<1}
C. {x|0<x<2}
D. {x|x>1}
16、
![](http://wximg.233.com/attached/image/20120913/20120913164660256025.jpg)
A.
![](http://wximg.233.com/attached/image/20120913/20120913164661166116.jpg)
B.
![](http://wximg.233.com/attached/image/20120913/20120913164625492549.jpg)
C. 2
D. -2
17、 已知平面向量a={3,x),b=-(-2,5),且a⊥b,则2=( )
![](http://wximg.233.com/attached/image/20120914/2012091416090648648.jpg)