The sum of the products of elements of any row with the cofactors of corresponding elements is:

Question

Smart Achievers · Accepted Answer

(1)

Ans. the value of the determinant

Explanation:

The sum of the products of the elements of any row with the cofactors of the corresponding elements is equal to the value of the determinant.

Let $Δ =$ $| \begin{matrix} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22} & a_{23} \\ a_{31} & a_{32} & a_{33} \end{matrix} |$

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