(2005•资阳)函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230646686990619/SYS201310212306466869906012_ST/0.png)
的自变量x的取值范围是
.
考点分析:
相关试题推荐
(2002•广州)在平坦的草地上有A,B,C三个小球,若已知A球和B球相距3米,A球和C球相距1米,则B球和C球可能相距
米.(球半径忽略不计,请填出两个符合条件的数)
查看答案
(2008•莱芜)分解因式:(2a+b)
2-8ab=
.
查看答案
如图,钝角等腰三角形AOB,EFG的顶点O,B,E在x轴上,A,F在函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230646686990619/SYS201310212306466869906009_ST/0.png)
图象上,且AE垂直x轴于点E,∠ABO=∠FGE=120°,则F点的坐标为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230646686990619/SYS201310212306466869906009_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230646686990619/SYS201310212306466869906009_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230646686990619/SYS201310212306466869906009_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230646686990619/SYS201310212306466869906009_ST/3.png)
D.
查看答案
已知方程a
3-5a
2+3a=0三个根分别为a
1,a
2,a
3,则计算a
1(a
2+a
3)+a
2(a
1+a
3)+a
3(a
1+a
2)的值( )
A.-5
B.6
C.-6
D.3
查看答案
如图,要在边长为16米的正方形草坪上安装喷水龙头,使整个草坪都要喷洒到水,假设每个喷水龙头的喷洒范围都是半径为6米的圆面,则需安装这种喷水龙头的个数最少是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230646686990619/SYS201310212306466869906007_ST/images0.png)
A.3个
B.4个
C.5个
D.6个
查看答案