Question:
Find the adjoint of the given matrix and verify in each case that $A .(\operatorname{adj} \mathrm{A})=(\operatorname{adj} \mathrm{A})=\mathrm{m}|\mathrm{A}| . \mathrm{I} .\left[\begin{array}{ccc}1 & -1 & 2 \\ 3 & 1 & -2 \\ 1 & 0 & 3\end{array}\right]$
Solution:
