If A = ∣∣ ∣∣563−432−4−73∣

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If A =

∣ ∣∣ ∣ \begin{matrix} 5 & 6 & 3 - 4 & 3 & 2 - 4 & - 7 & 3 \end{matrix} ∣ ∣∣ ∣,

then cofactors of the elements of

2^{n d}

row are

Options:

A . 39, -3, 11

B . -39, 3, 11

C . -39, 27, 11

D . -39, -3, 11

Answer: Option C
:
C

C_{21} = (- 1)^{2 + 1} (18 + 21) = - 39 C_{22} = (- 1)^{2 + 2} (15 + 12) = 27 C_{23} = (- 1)^{2 + 3} (- 35 + 24) = 11 .

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