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(7) (6 marks) Consider matrices A = 1 2 0 and B [22] (a) Find all 2 x2 matrices C = which commute with

(7) (6 marks) Consider matrices A = 1 2 0 and B [22] (a) Find all 2 x2 matrices C = which commute with A, that is AC = CA. (Hint, form a linear system for the entries of A and solve it).

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