Define the subset W2 of M3(R) to be the set of all matrices A e M3(R) satisfying a1,1 + a2,2 + a3,3 = 1. Explain why W2 is or is not a subspace of M3(R).

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.1: Vector Spaces And Subspaces
Problem 30EQ: In Exercises 24-45, use Theorem 6.2 to determine whether W is a subspace of V. V=Mnn,WAinMnn:detA=1
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Define the subset W2 of M3 (R) to be the set of all matrices A € M3(R) satisfying
a1,1 + a2,2 + a3,3 = 1. Explain why W2 is or is not a subspace of M3 (R).
Transcribed Image Text:Define the subset W2 of M3 (R) to be the set of all matrices A € M3(R) satisfying a1,1 + a2,2 + a3,3 = 1. Explain why W2 is or is not a subspace of M3 (R).
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