Question 2. Let P be an orthogonal matrix. (a) Prove that det P = 1 or det P = -1. (b) If det P = -1, show that I+P has no inverse. Hint. Show that P"(I +P) = (I + P)'.
Question 2. Let P be an orthogonal matrix. (a) Prove that det P = 1 or det P = -1. (b) If det P = -1, show that I+P has no inverse. Hint. Show that P"(I +P) = (I + P)'.
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section9.8: Determinants
Problem 34E
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