Which of the following subsets of R3x3 are subspaces of R³×3?

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter5: Orthogonality
Section5.5: Applications
Problem 30EQ
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Which of the following subsets of R³×3
are subspaces of R³×32
OA. The 3 x 3 matrices of determinant 2
OB. The 3 x 3 matrices whose entries are all integers
OC. The diagonal 3 x 3 matrices
D. The 3 x 3 matrices with all zeros in the first row
O E. The 3 x 3 matrices with trace 0 (the trace of a matrix is the sum of its diagonal entries)
OF. The 3 x 3 matrices whose entries are all greater than or equal to 0
Transcribed Image Text:Which of the following subsets of R³×3 are subspaces of R³×32 OA. The 3 x 3 matrices of determinant 2 OB. The 3 x 3 matrices whose entries are all integers OC. The diagonal 3 x 3 matrices D. The 3 x 3 matrices with all zeros in the first row O E. The 3 x 3 matrices with trace 0 (the trace of a matrix is the sum of its diagonal entries) OF. The 3 x 3 matrices whose entries are all greater than or equal to 0
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