Let r, y E R". Using the triangle inequality ||r + y|| < ||1|| + ||y||, show that r|| – ||y||| < ||r – y||, where || - || represents the Euclidean norm.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter2: Equations And Inequalities
Section2.7: More On Inequalities
Problem 55E
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Let r, y E R". Using the triangle inequality ||r + y|| < ||1|| + ||y||, show that r|| – ||y||| <
||r – y||, where || - || represents the Euclidean norm.
Transcribed Image Text:Let r, y E R". Using the triangle inequality ||r + y|| < ||1|| + ||y||, show that r|| – ||y||| < ||r – y||, where || - || represents the Euclidean norm.
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