Question

Development of matrix and matrix algebra

Answer 1

I dont know...............

Answer 2

$</p><p></p><p></p><p>A = \bmatrix </p><p>a_{11} & a_{12} & a_{13} \\</p><p>a_{21} & a_{22} & a_{23} \\</p><p>a_{31} & a_{32} & a_{33} /matrix</p><p></p><p>$