2. Let $A = \begin{pmatrix} 3 & -2 & 0 \ 4 & 4 & 1 \ -5 & 1 & 7 \end{pmatrix}$. Find the adjoint of A. If det(A) = 5, find the value of each of the following properties of determinants: a. det(B) b. det(C)
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Step 1
To find the cofactor matrix of A, we need to find the cofactor of each element in A. The cofactor of an element a_ij is given by (-1)^(i+j) * M_ij, where M_ij is the determinant of the matrix formed by removing the i-th row and j-th column of A. Show more…
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