Question: If A is a matrix whose entries in the first row are a =-1 , a, = 1 and 13 = -1 , and whose

If A is a matrix whose entries in the first row

If A is a matrix whose entries in the first row are a =-1 , a, = 1 and 13 = -1 , and whose adjoint is 2 0 Adj A = 6 - -2 0 . What is det A ? 0

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