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Given a square matrix $A$, let $adj (A)$ be the adjoint, and $C$ be the cofactor matrix of $A$. Which of the following is a representation of the adjoint of A, i.e, $adj (A) = ?$

A) $adj (A) = C^T$ B) $adj (A) = C$ C) $adj (A) = A. C$ D) $adj (A) = \frac{1}{C^T}$

1 Answer

Answer: $adj (A) = C^T$ (i.e, the transpose of the co-factor matrix of $A$).


answered Mar 12, 2013 by balaji.thirumalai

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