满分5 >
高中数学试题 >
已知椭圆的一条通径(过焦点且垂直于对称轴的弦)与抛物线y2=2px(p>0)的通...
已知椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005003_ST/0.png)
的一条通径(过焦点且垂直于对称轴的弦)与抛物线y
2=2px(p>0)的通径重合,则椭圆的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005003_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005003_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005003_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005003_ST/4.png)
考点分析:
相关试题推荐
若点P到直线x=-1的距离比它到点(2,0)的距离小1,则点P的轨迹为( )
A.圆
B.椭圆
C.双曲线
D.抛物线
查看答案
双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005001_ST/0.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005001_ST/1.png)
=1(mn≠0)的离心率为2,有一个焦点与抛物线y
2=4x的焦点重合,则mn的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005001_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005001_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005001_ST/4.png)
D.
查看答案
抛物线y=4x
2上的一点M到焦点的距离为1,则点M的纵坐标是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005000_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005000_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123758580200567/SYS201310251237585802005000_ST/2.png)
D.0
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123743429539030/SYS201310251237434295390022_ST/images0.png)
已知函数f(x)=x+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123743429539030/SYS201310251237434295390022_ST/0.png)
的定义域为(0,+∞),且f(2)=2+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123743429539030/SYS201310251237434295390022_ST/1.png)
.设点P是函数图象上的任意一点,过点P分别作直线y=x和y轴的垂线,垂足分别为M、N.
(1)求a的值.
(2)问:|PM|•|PN|是否为定值?若是,则求出该定值;若不是,请说明理由.
(3)设O为坐标原点,求四边形OMPN面积的最小值.
查看答案
定义数列A
n:a
1,a
2,…,a
n,(例如n=3时,A
3:a
1,a
2,a
3)满足a
1=a
n=0,且当2≤k≤n(k∈N
*)时,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131025123743429539030/SYS201310251237434295390021_ST/0.png)
.令S(A
n)=a
1+a
2+…+a
n.
(1)写出数列A
5的所有可能的情况;
(2)设a
k-a
k-1=c
k-1,求S(A
m)(用m,c
1,…,c
m的代数式来表示);
(3)求S(A
m)的最大值.
查看答案