满分5 >
高中数学试题 >
函数y=a1-x(a>0,a≠1)的图象恒过定点A,若点A在直线mx+ny-1=...
函数y=a
1-x(a>0,a≠1)的图象恒过定点A,若点A在直线mx+ny-1=0(mn>0)上,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727011_ST/0.png)
的最小值为
.
考点分析:
相关试题推荐
若A为抛物线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727010_ST/0.png)
的顶点,过抛物线焦点的直线交抛物线于B、C两点,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727010_ST/1.png)
等于
.
查看答案
定义一种运算:a⊗b=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727009_ST/0.png)
,已知函数f(x)=2
x⊗(3-x),那么函数y=(x+1)的大致图象是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727009_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727009_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727009_ST/images3.png)
D.
查看答案
如图是底面积为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727008_ST/0.png)
,体积为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727008_ST/1.png)
的正三棱锥的正视图(等腰三角形)和俯视图(等边三角形),此三棱锥的侧视图的面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727008_ST/images2.png)
A.6
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727008_ST/2.png)
C.2
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727008_ST/3.png)
D.
查看答案
函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727007_ST/0.png)
是R上的减函数,则a的取值范围是( )
A.(0,1)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727007_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727007_ST/2.png)
D.
查看答案
已知不等式组
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727006_ST/0.png)
表示的平面区域为D,若直线y=kx+1将区域D分成面积相等的两部分,则实数k的值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024190959952472769/SYS201310241909599524727006_ST/3.png)
D.
查看答案