If $A=\begin{bmatrix}

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Target Exam

CUET

Subject

-- Mathematics - Section A

Chapter

Matrices

Question:

If $A=\begin{bmatrix} 1 & 2\\ 1 & 3\\ \end{bmatrix}$, then $Adj A$ is equal to

Options:

$Adj A=\begin{bmatrix} -3 & -2\\ -1 & -1\\ \end{bmatrix}$

$Adj A=\begin{bmatrix} 3 & -2\\ -1 & -1\\ \end{bmatrix}$

$Adj A=\begin{bmatrix} 3 & 2\\ -1 & 1\\ \end{bmatrix}$

$Adj A=\begin{bmatrix} 3 & -2\\ -1 & 1\\ \end{bmatrix}$

Correct Answer:

$Adj A=\begin{bmatrix} 3 & -2\\ -1 & 1\\ \end{bmatrix}$

Explanation:

$Adj A=\begin{bmatrix} 3 & -2\\ -1 & 1\\ \end{bmatrix}$