Question

ayuda urgente por fa

Answer 1

$a_{11}=\frac{1-3\cdot1}{1\cdot 1}=-2~,~a_{12}=\frac{2-3\cdot1}{1\cdot 2}=-\frac{1}{2}~,~a_{13}=\frac{3-3\cdot1}{1\cdot 3}=0\\ \\ \\ a_{21}=\frac{2\cdot1-3}{ 1}=-1~,~a_{22}=\frac{2-3\cdot2}{2\cdot 2}=-1~,~a_{23}=\frac{3-3\cdot2}{2\cdot 3}=-\frac{1}{2}\\ \\ \\ a_{31}=\frac{3\cdot1-3}{1}=0~,~a_{32}=\frac{3\cdot2-3}{2}=\frac{3}{2}~,~a_{33}=\frac{3-3\cdot3}{3\cdot 3}=-\frac{2}{3}\\ \\ \\ A=\left[\begin{matrix} -2&-1/2&0\\ -1&-1&-1/2\\ 0&3/2&-2/3 \end{matrix}\right]$