$A^{-1} = \begin{bmatrix} 1 & 2 \\ 1 & 3 \end{bmatrix}$ হলে, A = ? (ক) $\begin{bmatrix} 3 & 1 \\ 2 & 1 \end{bmatrix}$ (খ) $\begin{bmatrix} 3 & -2 \\ -1 & 1 \end{bmatrix}$ (গ) $\begin{bmatrix} -1 & 1 \\ 2 & -3 \end{bmatrix}$ (ঘ) $\begin{bmatrix} 1 & 2 \\ 1 & 3 \end{bmatrix}$

ID#7017 HSC Higher Math 1st MCQ (Barisal 2023)

$A^{-1} = \begin{bmatrix} 1 & 2 \\ 1 & 3 \end{bmatrix}$ হলে, A = ?

ক) (ক) $\begin{bmatrix} 3 & 1 \\ 2 & 1 \end{bmatrix}$

খ) (খ) $\begin{bmatrix} 3 & -2 \\ -1 & 1 \end{bmatrix}$

গ) (গ) $\begin{bmatrix} -1 & 1 \\ 2 & -3 \end{bmatrix}$

ঘ) (ঘ) $\begin{bmatrix} 1 & 2 \\ 1 & 3 \end{bmatrix}$

খ

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