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A^{- 1}

A = [\begin{matrix} 1 & 4 \\ 2 & - 6 \end{matrix}]

\frac{1}{14} [\begin{matrix} 6 & 4 \\ - 2 & 1 \end{matrix}]

\frac{1}{14} [\begin{matrix} - 6 & - 4 \\ 2 & 1 \end{matrix}]

\frac{1}{14} [\begin{matrix} 6 & 4 \\ - 2 & - 1 \end{matrix}]

\frac{1}{- 14} [\begin{matrix} - 6 & - 4 \\ 2 & 1 \end{matrix}]

None

ANS : 5

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