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MATHEMATICS · Subjective · CBSE · Mathematics · Determinants · Determinants

Problem

6. If A=[11−221−354−9]\mathrm{A}=\left[\begin{array}{lll}1 & 1 & -2 \\ 2 & 1 & -3 \\ 5 & 4 & -9\end{array}\right], find ∣A∣|\mathrm{A}|

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