Show that U is a subspace of M3×3(R). Find a basis for U. You need to justify (or it must be clear from your work) that your list of vectors is indeed a basis for U.

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 29EQ: In Exercises 24-45, use Theorem 6.2 to determine whether W is a subspace of V. V=M22,W={[abcd]:adbc}
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Let M3x3(R) be the vector space of 3x3 real matrices and let
U = {M e M3x3 (R): the sum of the diagonal elements of M is 0}
(a) Show that U is a subspace of M3x3(R).
(b) Find a basis for U. You need to justify (or it must be clear from your
work) that your list of vectors is indeed a basis for U.
Transcribed Image Text:Let M3x3(R) be the vector space of 3x3 real matrices and let U = {M e M3x3 (R): the sum of the diagonal elements of M is 0} (a) Show that U is a subspace of M3x3(R). (b) Find a basis for U. You need to justify (or it must be clear from your work) that your list of vectors is indeed a basis for U.
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