Question

se A=(aij)3x3 tal que aij= i+j calcule A^-1
 me salvem !!

Answer 1

$A^{-1}$ = $\left[\begin{array}{ccc} \frac{1}{a_{11}}&\frac{1}{a_{12}}&\frac{1}{a_{13}}\\\frac{1}{a_{21}}&\frac{1}{a_{22}}&\frac{1}{a_{23}}\\\frac{1}{a_{31}}&\frac{1}{a_{32}}&\frac{1}{a_{33}}\end{array}\right]$