满分5 >
高中数学试题 >
已知△ABC是等腰三角形,∠C=90°,AB=4,则等于( ) A.-8 B. ...
已知△ABC是等腰三角形,∠C=90°,AB=4,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183459017825089/SYS201310241834590178250004_ST/0.png)
等于( )
A.-8
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183459017825089/SYS201310241834590178250004_ST/1.png)
C.8
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183459017825089/SYS201310241834590178250004_ST/2.png)
考点分析:
相关试题推荐
已知三个不同的平面α,β,γ和三条不同的直线a,b,c,有下列四个命题:①若a∥b,b∥c则a∥c;
②若α∥β,α∩γ=b,β∩γ=a,则a∥b;③若a⊥b,b⊥c,则a⊥c;④若a⊥α,α⊥β,则a∥β.其中正确命题的个数是( )
A.4个
B.3个
C.2个
D.1个
查看答案
圆x
2+y
2-2x+2y+1=0的圆心到直线x-y+1=0的距离是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183459017825089/SYS201310241834590178250002_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183459017825089/SYS201310241834590178250002_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183459017825089/SYS201310241834590178250002_ST/2.png)
D.
查看答案
若函数y=2
x的定义域是P={1,2,3},则该函数的值域是( )
A.{1,3}
B.{1,2,3}
C.{2,8}
D.{2,4,8}
查看答案
设集合M={x||x-1|<1},N={x|x(x-3)<0},则( )
A.M∩N=M
B.M∩N=N
C.M∩N=∅
D.M∪N=M
查看答案
已知定义域为[0,1]的函数同时满足以下三个条件:①对任意x∈[0,1],总有f(x)≥0;②f(1)=1;③若x
1≥0,x
2≥0,x
1+x
2≤1,则有f(x
1+x
2)≥f(x
1)+f(x
2)成立.
(1)求f(0)的值;
(2)函数g(x)=2
x-1在区间[0,1]上是否同时适合①②③?并予以证明;
(3)假定存在x
∈[0,1],使得f(x
)∈[0,1],且f(f(x
))=x
,求证:f(x
)=x
.
查看答案