题目
题型:不详难度:来源:
x2+(y-3)2 |
x2+(y+3)2 |
答案
x2+(y-3)2 |
x2+(y+3)2 |
∴2a=10,c=3,b2=a2-c2=16.
由椭圆的定义可知:点P的轨迹是椭圆:
y2 |
25 |
x2 |
16 |
故答案为:
y2 |
25 |
x2 |
16 |
核心考点
举一反三
(1)a=6,c=3,焦点在y轴上的椭圆
(2)过点M(
2 |
2 |
(3)一条渐近线方程是3x+4y=0,一个焦点是(5,0)的双曲线.
x2+(y-3)2 |
x2+(y+3)2 |
x2+(y-3)2 |
x2+(y+3)2 |
y2 |
25 |
x2 |
16 |
y2 |
25 |
x2 |
16 |
2 |
2 |