复数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253008_ST/0.png)
在复平面内对应的点到原点的距离是
.
考点分析:
相关试题推荐
点P是以F
1,F
2为焦点的椭圆上的一点,过焦点F
2作∠F
1PF
2的外角平分线的垂线,垂足为M点,则点M的轨迹是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253007_ST/images0.png)
A.抛物线
B.椭圆
C.双曲线
D.圆
查看答案
已知函数f(x)=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253006_ST/0.png)
的图象与直线y=k(x+2)-2恰有三个公共点,则实数k的取值范围是( )
A.(0,2)
B.(0,2]
C.(-∞,2)
D.(2,+∞)
查看答案
若△ABC的内角A,B,C所对的边a,b,c满足(a+b)
2-c
2=4,且C=60°,则ab的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253005_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253005_ST/1.png)
C.1
D.
查看答案
如图所示,为一几何体的三视图,则该几何体的体积是( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253004_ST/images0.png)
A.1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253004_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025124046257025325/SYS201310251240462570253004_ST/1.png)
D.
查看答案
如果f(x)的定义域为R,f(x+2)=f(x+1)-f(x),若f(1)=lg3-lg2,f(2)=lg3+lg5,则f(3)等于( )
A.1
B.lg3-lg2
C.-1
D.lg2-lg3
查看答案