解不等式组:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765017_ST/0.png)
,并将其解集在数轴上表示出来.
考点分析:
相关试题推荐
先化简,再求值:(a+b)(a-b)+b(b-2),其中a=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765016_ST/0.png)
,b=-1.
查看答案
⊙O上有两点A、B,∠AOB是小于平角的角,将∠AOB绕着圆心O旋转,当点B旋转到A时,点A旋转到C,如果点C和旋转前的点B关于圆心O成中心对称,则∠AOB=( )
A.45°
B.60°
C.90°
D.135°
查看答案
随意转动图中两转盘上的指针,指针静止在如图所示的情形时(即蓝色和绿色相配)的概率为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765014_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765014_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765014_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765014_ST/2.png)
D.
查看答案
如图,正五边形ABCDE中,DC和AB的延长线交于F,则图中与△DBF相似的三角形有(不再添加其他的线段和字母,不包括△DBF本身)( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765013_ST/images0.png)
A.1个
B.2个
C.3个
D.4个
查看答案
如图,过双曲线y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765012_ST/0.png)
(k是常数,k>0,x>0)的图象上两点A,B分别作AC⊥x轴于C,BD⊥x轴于D,则△AOC的面积S
1和△BOD的面积S
2的大小关系为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022160416037476595/SYS201310221604160374765012_ST/images1.png)
A.S
1>S
2B.S
1=S
2C.S
1<S
2D.S
1与S
2无法确定
查看答案