Question

椭圆X^2+2Y^2=4焦点坐标为?

Answer 1

X^2+2Y^2=4

x^2/(1/4)+y^2/(1/2)=1

1/2>1/4

a^2=1/2,b^2=1/4

c^2=a^2-b^2=1/4

c=1/2

焦点坐标：(0,-1/2),(0,1/2)