满分5 >
高中数学试题 >
已知命题p:函数y=log0.5(x2+2x+a)的值域为R,命题q:函数y=-...
已知命题p:函数y=log0.5(x2+2x+a)的值域为R,命题q:函数y=-(5-2a)x是减函数.若p或q为真命题,p且q为假命题,则实数a的取值范围是( )
A.a≤1
B.a<2
C.1<a<2
D.a≤1或a≥2
考点分析:
相关试题推荐
方程f(x,y)=0的曲线如图所示,那么方程f(2-x,y)=0的曲线是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214059458671666/SYS201310232140594586716005_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214059458671666/SYS201310232140594586716005_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214059458671666/SYS201310232140594586716005_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214059458671666/SYS201310232140594586716005_ST/images3.png)
D.
查看答案
对函数f(x)=3x
2+ax+b作代换x=g(t),则总不改变f(x)值域的代换是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214059458671666/SYS201310232140594586716004_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023214059458671666/SYS201310232140594586716004_ST/1.png)
C.g(t)=(t-1)
2D.g(t)=cost
查看答案
已知函数f(x),x∈F,那么集合{(x,y)|y=f(x),x∈F}∩{(x,y)|x=1}中所含元素的个数是( )
A.0
B.1
C.0或1
D.1或2
查看答案
函数y=log
a(2-ax)在[0,1]上是减函数,则a的取值范围是( )
A.(0,1)
B.(0,2)
C.(1,2)
D.(2,+∞)
查看答案
下面四个结论:
①偶函数的图象一定与y轴相交;
②奇函数的图象一定通过原点;
③偶函数的图象关于y轴对称;
④既是奇函数又是偶函数的函数一定是f(x)=0(x∈R),
其中正确命题的个数是( )
A.1
B.2
C.3
D.4
查看答案