If A = [2134]begin{bmatrix}2 & 1\3 & 4end{bmatrix}, then adj(A) = ?

  • [4−1−32]begin{bmatrix}4 & -1\-3 & 2end{bmatrix}
  • [4132]begin{bmatrix}4 & 1\3 & 2end{bmatrix}
  • [2−1−34]begin{bmatrix}2 & -1\-3 & 4end{bmatrix}
  • [1234]begin{bmatrix}1 & 2\3 & 4end{bmatrix}
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