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Determine which subsets are subspaces of M 2x2 (R) and prove your answer. a. W = {A...

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Advance Math

Determine which subsets are subspaces of M 2x2 (R) and proveyour answer.

a. W = {A ? M 2x2 (R) | a12 = -a21}

b. W = {A ? M 2X2 (R) | a12 = 1}

c. Fix B ? M 2x2 (R). Let W ={ A ? M 2x2 (R) | AB = BA

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