4) Consider the ellipse x? – xy + y? = 3. From all points (x, y) of this ellipse, find: 1. the ones with the largest and smallest values of y. 2. the ones with the largest and smallest values of x.
4) Consider the ellipse x? – xy + y? = 3. From all points (x, y) of this ellipse, find: 1. the ones with the largest and smallest values of y. 2. the ones with the largest and smallest values of x.
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter7: Conic Sections
Section7.2: Ellipses
Problem 1E: An ellipse is the set of all points in the plane for which the ____ of the distances from two fixed...
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Expert Solution
Step 1
1. Note that the smallest and largest value of y occur when dy/dx =0.
Taking derivative on both sides,
Largest value of y is at (1,2) and smallest value is at (-1,-2)
Step 2
1. Note that the smallest and largest value of x occur when dx/dy =0.
Taking derivative on both sides,
Now, solving for y for x = 2 and -2 gives y = x/2, so y = 1 and -1.
Largest value of x is at (2,1) and smallest value is at (-2,-1)
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