满分5 >
初中数学试题 >
(2009•兰州)2008年爆发的世界金融危机,是自上世纪三十年代以来世界最严重...
(2009•兰州)2008年爆发的世界金融危机,是自上世纪三十年代以来世界最严重的一场金融危机.受金融危机的影响,某商品原价为200元,连续两次降价a%后售价为148元,下面所列方程正确的是( )
A.200(1+a%)2=148
B.200(1-a%)2=148
C.200(1-2a%)=148
D.200(1-a2%)=148
考点分析:
相关试题推荐
(2013•呼和浩特)在同一直角坐标系中,函数y=mx+m和y=-mx
2+2x+2(m是常数,且m≠0)的图象可能是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390007_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390007_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390007_ST/images2.png)
D.
查看答案
(2009•长沙)下列各式中,运算正确的是( )
A.a
6÷a
3=a
2B.(a
3)
2=a
5C.2
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390006_ST/0.png)
+3
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390006_ST/1.png)
=5
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390006_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390006_ST/3.png)
÷
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390006_ST/4.png)
=
查看答案
(2010•漳州)若
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390005_ST/0.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390005_ST/1.png)
=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390005_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390005_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390005_ST/4.png)
D.
查看答案
(2007•云南)一元二次方程3x
2-x=0的解是( )
A.x=0
B.x
1=0,x
2=3
C.x
1=0,x
2=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390004_ST/0.png)
D.x=
查看答案
(2007•昆明)点A(2,m)在反比例函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230557000539014/SYS201310212305570005390003_ST/0.png)
的图象上,则m的值为( )
A.24
B.-24
C.6
D.-6
查看答案