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Determinantshard
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Let AAA be a 3×33 \times 33×3 matrix such that det⁡(A)=3\det(A) = 3det(A)=3. What is det⁡(2A−1⋅adj(A))\det(2A^{-1} \cdot \text{adj}(A))det(2A−1⋅adj(A))?