Question:
Prove that:
(i) adj $\mathrm{I}=\mathrm{I}$
(ii) adj $\mathrm{O}=\mathrm{O}$
(iii) $\mathrm{I}^{-1}=\mathrm{I}$.
Solution:
Prove that
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Prove that:
(i) adj $\mathrm{I}=\mathrm{I}$
(ii) adj $\mathrm{O}=\mathrm{O}$
(iii) $\mathrm{I}^{-1}=\mathrm{I}$.