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

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a

39, -3,11

b

-39,3,11

c

-39,27,11

d

-39,-3,11

answer is C.

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Detailed Solution

C21=(−1)2+1(18+21)=−39 C22=(−1)2+2(15+12)=27 C23=(−1)2+3(−35+24)=11

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