满分5 >
初中数学试题 >
观察下列顺序排列的等式:a1=1-,a2=-,a3=-,a4=-,….试猜想第n...
观察下列顺序排列的等式:a
1=1-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/0.png)
,a
2=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/1.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/2.png)
,a
3=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/3.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/4.png)
,a
4=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/5.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430014_ST/6.png)
,….试猜想第n个等式(n为正整数):a
n=
.
考点分析:
相关试题推荐
如果一个扇形的圆心角为135°,半径为8,那么该扇形的弧长是
.
查看答案
下面是一个简单的数值运算程序,当输入x的值为2时,输出的数值是
.
查看答案
请你写出一个图象在第二、四象限的反比例函数
.
查看答案
如图,⊙O的半径为5,弦AB的长为8,点M在线段AB(包括端点A,B)上移动,则OM的取值范围是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101193903638343073/SYS201311011939036383430009_ST/images0.png)
A.3≤OM≤5
B.3≤OM<5
C.4≤OM≤5
D.4≤OM<5
查看答案