If $$A=132$$−$$1$$ then adj $$A=$$

Correct option is 1−1−3−21

Questions

$If A = [\begin{array}{cc} 1 & 3 \\ 2 & - 1 \end{array}] then adj A =$

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−1−3−21

1−3−21

1−321

−1−3−2−1

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detailed solution

Correct option is A

If A=a bc d then adj A=d−b−caadj⁡A=−1−3−21

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If A=132−1 then adj A=

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$If A = [\begin{array}{cc} 1 & 3 \\ 2 & - 1 \end{array}] then adj A =$