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3 1 . Given A = and B = . Determine AB and BA . 4 7 (3) 2. Given X = and Y =

3 1 . Given A = and B = . Determine AB and BA . 4 7 (3) 2. Given X = and Y = 0 3 2 -1 Show that (X + Y) (X -Y) # X2 _ Y2 (10 - 3. Given the matrix D = -3 N 4 , find the inverse matrix of D . (8) 3 -2

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