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OpenStudy (anonymous):
which of following subsets of R3*3 are subspaces of R3*3? 1. 3*3 matrices whoose entries are all integers 2. 3*3 matrices in reduced row-echelon form 3. the diagonal 3*3 matrices 4. the 3*3 matrices of rank 2 5. 3*3 matrices with trace 0(i.e. sum of its diagonal entries)
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OpenStudy (anonymous):
how many answers are correct
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