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2. For each of the following matrices, find all real numbers x such that it is invertible. 0 0 0 4 2 A =

2. For each of the following matrices, find all real numbers x such that it is invertible. 0 0 0 4 2 A = B 1 -2 4 -2 -3 1 -2 -2 -1 1 0 0 1

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