求适合下列条件的椭圆的标准方程:
(1)两个焦点的坐标分别是(-4,0),(4,0),椭圆上一点P到两焦点距离之和等于10;
(2)两个焦点的坐标分别是(0,-2)、(0,2),并且椭圆经过点(-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836016_ST/0.png)
).
考点分析:
相关试题推荐
有下列命题:①双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836015_ST/0.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836015_ST/1.png)
=1与椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836015_ST/2.png)
+y
2=1有相同的焦点;②(lnx)
′=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836015_ST/3.png)
;③(tanx)
′=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836015_ST/4.png)
;④(
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836015_ST/5.png)
)
′=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836015_ST/6.png)
;⑤∀x∈R,x
2-3x+3≠0.其中是真命题的有:
.(把你认为正确命题的序号都填上)
查看答案
曲线y=xe
x+2x+1在点(0,1)处的切线方程为
.
查看答案
椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836013_ST/0.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836013_ST/1.png)
=1上一点P到它的一个焦点的距离等于3,那么点P到另一个焦点的距离等于
.
查看答案
双曲线
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836012_ST/0.png)
-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836012_ST/1.png)
=1的渐近线方程是
.
查看答案
设f(x)=xlnx,若f′(x
)=2,则x
=( )
A.e
2B.e
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101225134671483666/SYS201311012251346714836011_ST/0.png)
D.ln2
查看答案