PAU Applied Math ACS II (Galicia) Practice Questions - Galicia PAU Applied Mathematics For Social Sciences II Matemáticas Aplicadas A Las Ciencias Sociales II Exam

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Given matrix A = [[2, 1], [0, 2]] and matrix B = [[x, y], [0, x]], under what conditions on real numbers x and y does AB = BA hold?

For all real numbers x and y Only when x = 0 Only when y = 0 Only when x = y

Correct Answer:

For all real numbers x and y

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