Question: Help me plz Q 4. [10+10 marks] a) Let A and B be two skew-symmetric 2x2 matrices. Show that AB is a scalar matrix. b)

Help me plz

Q 4. [10+10 marks] a) Let A and B be two skew-symmetric 2x2 matrices. Show that AB is a scalar matrix. b) Let C and D be two nxn matrices satisfying C+ D-C+ D= O. Show that C is a symmetric matrix and D is a skew-symmetric matrix

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