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If \( A=\left[\begin{array}{ccc}1 & 1 & 2 \\ 1 & 3 & 4 \\ 1 & -1 & 3\end{array}\right], B=\operatorname{adj} A \) and \( C=3 A \), then \( \frac{|\operatorname{adj} B|}{|C|} \) is equal to
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