find AB, BA, A +B, A - B, A, B, 5A, 3B. Observe that AB + BA. Show that (A - B)(A + B) # (A + B)(A – B) + A? - B. Show that det AB = det BA = (det A)(det B), but that det(A + B) # det A + det B. Show that det(5A) # 5 det A, and find n so that det (5A) = 5" det A. Find similar results for det (3B). Remember that the point of doing these simple problems by hand is to learn how to manipulate determinants and matrices correctly. 2 -5 2. A =

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 86E
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find AB, BA, A +B, A - B, A, B, 5A, 3B. Observe that AB + BA.
Show that (A - B)(A + B) # (A + B)(A – B) + A? - B. Show that det AB = det BA =
(det A) (det B), but that det(A + B) + det A + det B. Show that det(5A) + 5 det A, and
find n so that det (5A) = 5" det A. Find similar results for det (3B). Remember that the
point of doing these simple problems by hand is to learn how to manipulate determinants
and matrices correctly.
2
2.
A =
Transcribed Image Text:find AB, BA, A +B, A - B, A, B, 5A, 3B. Observe that AB + BA. Show that (A - B)(A + B) # (A + B)(A – B) + A? - B. Show that det AB = det BA = (det A) (det B), but that det(A + B) + det A + det B. Show that det(5A) + 5 det A, and find n so that det (5A) = 5" det A. Find similar results for det (3B). Remember that the point of doing these simple problems by hand is to learn how to manipulate determinants and matrices correctly. 2 2. A =
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