Ononot — Calculate \det \begin{pmatrix} 1 & 0 & 2 \\ 0 & 3 & 0 \\ 1 &

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Determinantseasy

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Calculate $\det \begin{pmatrix} 1 & 0 & 2 \\ 0 & 3 & 0 \\ 1 & 0 & 4 \end{pmatrix}$ using cofactor expansion along the second row.