A) \[adj(adj(1))=|A{{|}^{2}}.{{(adj(1))}^{-1}}\]
B) \[adj(adj(1))=|A|.{{(adj(1))}^{-1}}\]
C) \[adj(adj(1))=|A|.A\]
D) \[adj(1)=|A|.{{A}^{-1}}\]
Correct Answer: C
Solution :
See theory
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