Question
$\left[ {\begin{array}{*{20}{c}}1&1&1\\1&2&{ - 3}\\2&{ - 1}&3\end{array}} \right]$ का सहखण्डज है
$ \Rightarrow $ ${A_{11}} = 3,\,\,{A_{12}} = - 9,\,\,{A_{13}} = - 5$
${A_{21}} = - 4,\,{A_{22}} = 1,\,{A_{23}} = 3$
${A_{31}} = - 5,\,{A_{32}} = 4,\,{A_{33}} = 1$
$ \Rightarrow $ $Adj\,(A) = \left[ {\begin{array}{*{20}{c}}3&{ - 4}&{ - 5}\\{ - 9}&1&4\\{ - 5}&3&1\end{array}} \right]$.
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