满分5 >
初中数学试题 >
如图,已知抛物线y=ax2+bx+c(a>0)的对称轴是过点(1,0)且平行于y...
如图,已知抛物线y=ax
2+bx+c(a>0)的对称轴是过点(1,0)且平行于y轴的直线,并且经过点P(3,0),则a-b+c的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121006_ST/images0.png)
A.3
B.-3
C.-1
D.0
考点分析:
相关试题推荐
如图,点P为反比例函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121005_ST/0.png)
上的一动点,作PD⊥x轴于点D,△POD的面积为k,则函数y=kx-1的图象为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121005_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121005_ST/images2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121005_ST/images3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121005_ST/images4.png)
D.
查看答案
若两圆的半径分别是5cm和8cm,圆心距为2cm,则这两圆的位置关系是( )
A.外离
B.相交
C.外切
D.内含
查看答案
国家投资建设的泰州长江大桥已经开工,据泰州日报报道,大桥预算总造价是9 370 000 000元人民币,用科学记数法表示为( )
A.93.7×10
9元
B.9.37×10
9元
C.9.37×10
10元
D.0.937×10
10元
查看答案
下面的图形是由8个棱长为1个单位的小立方体组成的立体图形,这个立体图形的左视图是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121002_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121002_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121002_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101192737361812104/SYS201311011927373618121002_ST/images3.png)
D.
查看答案
下列计算中,正确的是( )
A.a
10÷a
5=a
2B.3a-2a=a
C.a
3-a
3=1
D.(a
2)
3=a
5
查看答案