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Question

If A = ∣∣ ∣∣563−432−4−73∣∣ ∣∣, then cofactors of the elements of 2nd row are

A
39, -3, 11
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B
-39, 3, 11
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C
-39, 27, 11
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D
-39, -3, 11
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Solution

The correct option is C -39, 27, 11
C21 = (1)2+1(18+21) = 39C22 = (1)2+2(15+12) = 27C23 = (1)2+3(35+24) = 11 .

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