1.4.21 Matrix Transformations

Condition: given the matrix \ (m = \ left (\ begin {array} {ccc} -2 & -1 &1 & 4 & 0 & 0 & 2 & 1 & 1 &1 \ End {Array} \ Right): A) Find the minor and algebral addition of the element \ (( m_ {23} \) matrices \ (m \); b) calculate the determinant of the matrix \ (m \) by decomposition on the 2nd line; c) show that the matrix \ (m \) is reversible and find the matrix in the reverse matrix \ (m \ left (m^{-1} \ right) \), make a check (i.e. show that \ (m m^{-1} = e \)).