Prove that |x y| |x| |y|. Use the Triangle Inequality with a = x

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Prove that |x − y| ≥ |x| − |y|. Use the Triangle Inequality with a = x − y and b = y.

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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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