Mathematics - Matrix Question with Solution | TestHub

$\left|\mathrm{adj}\left(\mathrm{adj}{A}^2\right)\right|=$ $|\mathrm{adj}\mathrm{A}|=|\mathrm{A}{|}^{n-1}=|\mathrm{A}{|}^2$ $\left|\mathrm{adj}{A}^2\right|=|\mathrm{adj}A{|}^2={\left(|A{|}^2\right)}^2=|A{|}^4$ $\left|\mathrm{adj}\left(\mathrm{adj}{A}^2\right)\right|={\left(|A{|}^4\right)}^{3-1}$ $={\left(|A{|}^4\right)}^2=|A{|}^8$