Question

define parabola and ellipse

Answer 1

Parabola:- In mathematics, a parabola is a plane curve which is mirror-symmetrical and is approximately U-shaped. It fits any of several superficially different mathematical descriptions, which can all be proved to define exactly the same curves.
Ellipse:- An ellipse is a curve that is the locus of all points in the plane the sum of whose distances and from two fixed points and (the foci) separated by a distance of is a given positive constant 

Answer 2

parabola is defined as follows: For a given point, called the focus, and a given line not through the focus, called the directrix, aparabola is the locus of points such that the distance to the focus equals the distance to the directrix.

ellipse is curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve.
An ellipse may also be defined analytically as the set of points for each of which the sum of its distances to two foci is a fixed number.

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