若关于x一元二次方程
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092013_ST/0.png)
有两个实数根,则m的取值范围是
.
考点分析:
相关试题推荐
如图,以正方形ABCD的AB边为直径作半圆O,过点C作直线切半圆于点E,交AD边于点F,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092011_ST/0.png)
=( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092011_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092011_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092011_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092011_ST/3.png)
D.
查看答案
如图,将半径为8的⊙O沿AB折叠,弧AB恰好经过与AB垂直的半径OC的中点D,则折痕AB长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092010_ST/images0.png)
A.2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092010_ST/0.png)
B.4
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092010_ST/1.png)
C.8
D.10
查看答案
如图所示的向日葵图案是用等分圆周画出的,则⊙O与半圆P的半径的比为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092009_ST/images0.png)
A.5﹕3
B.4﹕1
C.3﹕1
D.2﹕1
查看答案
附加题:如图,在矩形ABCD中,AB=3,BC=4,点P在BC边上运动,连接DP,过点A作AE⊥DP,垂足为E,设DP=x,AE=y,则能反映y与x之间函数关系的大致图象是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092008_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092008_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092008_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190002521409265/SYS201311011900025214092008_ST/images3.png)
D.
查看答案