/1 2. If A = 1 1 2 1 3-2 and 2 2 /1 2 2 1 2 1 AB + BT? B = 4 2 /11 12 -21 a. 13 6 -1 SB 13 9 3 11 12 2 b. 13 6 1 13 9 3 -1, what is 1). ( k

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