满分5 >
初中数学试题 >
观察下列计算:•(+1)=(-1)(+1)=1, (+)(+1)=[(-1)+(...
观察下列计算:
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/0.png)
•(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/1.png)
+1)=(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/2.png)
-1)(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/3.png)
+1)=1,
(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/4.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/5.png)
)(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/6.png)
+1)=[(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/7.png)
-1)+(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/8.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/9.png)
)](
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/10.png)
+1)=2,
(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/11.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/12.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/13.png)
)(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/14.png)
+1)=[(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/15.png)
-1)+(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/16.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/17.png)
)+(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/18.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/19.png)
)](
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/20.png)
+1)=3,
…
从以上计算过程中找出规律,并利用这一规律进行计算:
(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/21.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/22.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/23.png)
+…+
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/24.png)
)(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367009_ST/25.png)
+1)的值为( )
A.2008
B.2010
C.2011
D.2009
考点分析:
相关试题推荐
直线l
1:y=k
1x+b与直线l
2:y=k
2x+c在同一平面直角坐标系中的图象如图所示,则关于x的不等式k
1x+b<k
2x+c的解集为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367008_ST/images0.png)
A.x>1
B.x<1
C.x>-2
D.x<-2
查看答案
如图,直线y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367007_ST/0.png)
与双曲线y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367007_ST/1.png)
(x>0)交于点A、将直线y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367007_ST/2.png)
向右平移
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367007_ST/3.png)
个单位后,与双曲线y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367007_ST/4.png)
(x>0)交于点B,与x轴交于点C,若
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367007_ST/5.png)
,则k的值为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367007_ST/images6.png)
A.2
B.6
C.12
D.8
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367006_ST/images0.png)
如图,在矩形ABCD中,点E为边BC的中点,AE⊥BD,垂足为点O,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367006_ST/0.png)
的值等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367006_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367006_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367006_ST/3.png)
D.
查看答案
如图,抛物线y=ax
2+bx+c,OA=OC,下列关系中正确的是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367005_ST/images0.png)
A.ac+1=b
B.ab+1=c
C.bc+1=a
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367005_ST/0.png)
+1=c
查看答案
如图,△DEF是由△ABC经过位似变换得到的,点O是位似中心,D,E,F分别是OA,OB,OC的中点,则△DEF与△ABC的面积比是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164010230636791/SYS201310221640102306367004_ST/images0.png)
A.1:2
B.1:4
C.1:5
D.1:6
查看答案