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15 A3. (a) If A = [ 2], determine, AT, adj(A), det(A) and A-. 14 (4 marks) (b) By using Cramer's rule only, solve the

15 A3. (a) If A = [ 2], determine, AT, adj(A), det(A) and A-. 14 (4 marks) (b) By using Cramer's rule only, solve the following system of linear equations: [3 51 (4 marks) 15 ]]= [3]

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