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यदि Δ = \(\begin{vmatrix} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22} & a_{23} \\ a_{31} & a_{32} & a_{33} \end{vmatrix}\) और aij का सहगुणनखण्ड Aij हो तो ∆ का मान निम्नलिखित रूप में व्यक्त किया जाता है

(अ) a11A31 + a12A32 + a13A33
(ब) a11A11 + a12A21 + a13A31
(स) a21A11 + a22A12 + a23A13
(द) a11A11 + a21A21 + a31A31

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