Ononot — Find the determinant of the 4 \times 4 matrix A = \begin{pma

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Determinantshard

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Find the determinant of the $4 \times 4$ matrix $A = \begin{pmatrix} 1 & 2 & 0 & 0 \\ 3 & 4 & 0 & 0 \\ 0 & 0 & 5 & 6 \\ 0 & 0 & 7 & 8 \end{pmatrix}$ .