Prove the triangle inequality (|a + b| |a| + |b|) by adding the two inequalities: -lal

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Prove the triangle inequality (|a + b| ≤ |a| + |b|) by adding the two inequalities:

-lal  a lal, -|b1  b |bl

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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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