Q. 53.7( 27 Votes )

If and Aij is Cofactors of aij, then value of Δ is given by
A. a11 A31+ a12 A32 + a13 A33

B. a11 A11+ a12 A21 + a13 A31

C. a21 A11+ a22 A12 + a23 A13

D. a11 A11+ a21 A21 + a31 A31

Answer :

Δ =

Expanding along Column 1

Δ =

Δ = a11A11 + a21A21 + a31A31

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