Let A = (aij) be a nonsingular square matrix of order n. Prove:
b) If n = 3, then A−1 is the matrix
c) Let Aij denote the minor determinant of A obtained by deleting the i th row and j th column from A. Let bij = (−1)i + j Aji. The matrix B = (bij) is called the adjoint of A and is denoted by adj A. Show that
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