满分5 >
初中数学试题 >
(2007•天津)已知关于x的一元二次方程(m-2)2x2+(2m+1)x+1=...
(2007•天津)已知关于x的一元二次方程(m-2)
2x
2+(2m+1)x+1=0有两个不相等的实数根,则m的取值范围是( )
A.m>
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302005_ST/0.png)
B.m≥
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302005_ST/1.png)
C.m>
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302005_ST/2.png)
且m≠2
D.m≥
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302005_ST/3.png)
且m≠2
考点分析:
相关试题推荐
(2007•天津)已知a=2,则代数式
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302004_ST/0.png)
的值等于( )
A.-3
B.3-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302004_ST/1.png)
C.4
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302004_ST/2.png)
-3
D.4
查看答案
(2007•天津)下列判断中错误的是( )
A.有两角和一边对应相等的两个三角形全等
B.有两边和一角对应相等的两个三角形全等
C.有两边和其中一边上的中线对应相等的两个三角形全等
D.有一边对应相等的两个等边三角形全等
查看答案
(2009•滨州)顺次连接对角线互相垂直的四边形的各边中点,所得图形一定是( )
A.矩形
B.直角梯形
C.菱形
D.正方形
查看答案
(2007•天津)下列图形中,为轴对称图形的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302001_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302001_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302001_ST/images2.png)
D.
查看答案
(2007•天津)sin45°+cos45°的值等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302000_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302000_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110513282730218/SYS201310191105132827302000_ST/2.png)
D.1
查看答案