If A=\left[\begin{array}{ccc}1 & 2 & 3 \ -1 & 1 & 2 \ 1 & 2 & 4]\end{array} and A_{i j} is a cofactor of a_{i j} then the value of a_{21} A_{21}+a_{22} A_{22}+a_{23} A_{23} is

MHTCET 13 May 2023 Shift 1 Solved Paper

Section: Mathematics

Question : 69 of 150

Marks: +1, -0

If A=[

] and Aij is a cofactor of aij then the value of a21A21+a22A22+a23A23 is

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