The Total solution for NCERT class 6-12
If and Aij isCofactors of aij, then value of Δ is given by
We know that:
Δ = Sum of the product of the elements of acolumn (or a row) with their corresponding cofactors
∴Δ = a11A11 + a21A21 + a31A31
Hence, the value of Δ is given by the expressiongiven in alternative D.
The correct answer is D.