满分5 >
高中数学试题 >
已知整数以按如下规律排成一列:(1,1)、(1,2)、(2,1)、(1,3)、(...
已知整数以按如下规律排成一列:(1,1)、(1,2)、(2,1)、(1,3)、(2,2),(3,1),(1,4),(2,3),(3,2),(4,1),…,则第60个数对是( )
A.(10,1)
B.(2,10)
C.(5,7)
D.(7,5)
考点分析:
相关试题推荐
已知角α满足sinα+cosα>0,tanα-sinα<0,则角α的范围可能是( )
A.(0,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645003_ST/0.png)
)
B.(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645003_ST/1.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645003_ST/2.png)
)
C.(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645003_ST/3.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645003_ST/4.png)
)
D.(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645003_ST/5.png)
,π)
查看答案
已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645002_ST/0.png)
,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645002_ST/1.png)
等于( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645002_ST/2.png)
B.7
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645002_ST/3.png)
D.-7
查看答案
使“lgm<1”成立的一个充分不必要条件是( )
A.m∈(0,+∞)
B.m∈{1,2}
C.0<m<10
D.m<1
查看答案
下列函数中周期为π且图象关于直线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645000_ST/0.png)
对称的函数是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645000_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645000_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182664556/SYS201311012247011826645000_ST/3.png)
D.
查看答案
已知椭圆C:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182498334/SYS201311012247011824983019_ST/0.png)
上有两点P和Q.P、Q在X轴上射影分别是椭圆的左右焦点F
1,F
2且P、Q连线斜率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224701182498334/SYS201311012247011824983019_ST/1.png)
.
(1)求椭圆的离心率;
(2)若以PQ为直径的圆与直线x+y+6=0相切,求椭圆C方程.
查看答案