Show that the linear map (x, y)H (x+ y, x- y) from (R?, || - |1,) to (R?, I| - ||is an isometry.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.7: Distinguishable Permutations And Combinations
Problem 21E
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Show that the linear map (x, y) H (x+ y, x- y)
from (R?, || - |I,) to (R?, || - ||) is an isometry.
Transcribed Image Text:Show that the linear map (x, y) H (x+ y, x- y) from (R?, || - |I,) to (R?, || - ||) is an isometry.
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