- #1
Dustinsfl
- 2,281
- 5
The set of all points \(P(x,y)\) in a plane, such that the difference of their distance from two fixed points is a positive constant is called?
ellipse
hyperbola
parabola
circle
How do I work this out? Are the two fixed points supposed to be the foci? Wouldn't this also depend on the how one performs the difference? For instance, take a circle of radius a. Then \(-a - a = -2a\) which is negative.
ellipse
hyperbola
parabola
circle
How do I work this out? Are the two fixed points supposed to be the foci? Wouldn't this also depend on the how one performs the difference? For instance, take a circle of radius a. Then \(-a - a = -2a\) which is negative.