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B
⎡⎢⎣73−263111−5−21⎤⎥⎦
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C
⎡⎢⎣311173−26−521⎤⎥⎦
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D
Noneofthese
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Solution
The correct option is DNoneofthese Let A = ⎡⎢⎣3572−31112⎤⎥⎦, |A|=3(-7)-5(3)+7(5)=-1
Adj(A)=⎡⎢⎣−7−326−3−11155−19⎤⎥⎦A−1=Adj(A)|A|A−1is⎡⎢⎣73−26−3−1−11−5−519⎤⎥⎦