Question: Prove that |a b| |a| |b|. Apply the triangle inequality from Problem 93 to Data from problem 93 Prove the triangle inequality

Prove that |a − b| ≥ |a| − |b|. Apply the triangle inequality from Problem 93 tolal = |(a - b) + bl.]


Data from problem 93


Prove the triangle inequality |a + b| ≤ |a| + |b|. Expand |a + b|2 = (a + b)2, and use the fact that a ≤ |a|. ]

lal = |(a - b) + bl.]

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