If r = (x, y), r 1 = (x 1 , y 1 ), and r 2

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If r = (x, y), r1 = (x1, y1), and r2 = (x2, y2), describe the set of all points (x, y) such that |r − r1| + |r − r2| = k, where k > |r1 − r2|.

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Calculus Early Transcendentals

ISBN: 9781337613927

9th Edition

Authors: James Stewart, Daniel K. Clegg, Saleem Watson, Lothar Redlin

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