Determinantshard
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Let AA be a 3×33 \times 3 matrix with det(A)=5\det(A) = 5. What is the determinant of the matrix M=(2A003I)M = \begin{pmatrix} 2A & 0 \\ 0 & 3I \end{pmatrix}, where MM is a 6×66 \times 6 block diagonal matrix?