满分5 >
高中数学试题 >
已知圆C与直线x-y=0及x-y-4=0都相切,圆心在直线x+y=0上,则圆C的...
已知圆C与直线x-y=0及x-y-4=0都相切,圆心在直线x+y=0上,则圆C的方程为 .
考点分析:
相关试题推荐
(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722011_ST/0.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722011_ST/1.png)
)
10的常数项是
(用数字作答).
查看答案
在△ABC中,∠A,∠B,∠C所对的边分别是a,b,c,已知a
2+b
2-c
2=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722010_ST/0.png)
ab,则∠C=
.
查看答案
2位男生和3位女生共5位同学站成一排,若男生甲不站两端,3位女生中有且只有两位女生相邻,则不同排法的种数是( )
A.60
B.48
C.42
D.36
查看答案
半径为1的球面上有A、B、C三点,其中点A与B、C两点间的球面距离均为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722008_ST/0.png)
,B、C两点间的球面距离均为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722008_ST/1.png)
,则球心到平面ABC的距离为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722008_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722008_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722008_ST/4.png)
D.
查看答案
下列各式中,最小值等于2的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722007_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722007_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183239622772204/SYS201310241832396227722007_ST/2.png)
D.2
x+2
-x
查看答案