For an ellipse

MATHEMATICS · Single correct · AP · AP Precalculus · Functions with Parameters, Vectors, and Matrices · Functions with Parameters, Vectors, and Matrices

Problem

For an ellipse, the constant sum of focal distances is

14

. If for a point

R

on the ellipse one focal distance is

9

, find the other focal distance. (a)

7

(b)

9

(c)

5

(d)

6

Related theory

Ellipse
Conic Sections
Ellipse standard equation
Coordinate Geometry

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