Question: Let A be an n x n matrix in which the entries of each column sum to zero. Find the value of det (4).

Let A be an n x n matrix in which the entries of each column sum to zero. Find the value of det(A). [6](8)

Let A be an n x n matrix in which the entries of each column sum to zero. Find the value of det (4). [6](8) (a) Show that an n xn matrix A is not invertible, then A[adj (4)] is the zero matrix. (b) Show that det(adj (4)) = (det (4))"-

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