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प्रश्न
If A is a square matrix of order 3 such that |A| = 3, then write the value of adj (adj A).
उत्तर
For any square matrix A, we have
\[\left| adj(adj A) \right| = \left| A \right|^{(n - 1)^2 }\]
\[ \Rightarrow \left| adj(adj A) \right| = \left( 3 \right)^4 = 81\]
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