9. If \( A=\left[\begin{array}{cc}x & -2 \\ 3 & 7\end{array}\right] \) and \( A^{-1}=\left[\begin{array}{cc}\frac{7}{34} & \frac{1}{17} \\ \frac{-3}{34} & \frac{2}{17}\end{array}\right] \), then the value of \( x \) is (a) 2 (b) 3 (c) \( -4 \) (d) 4

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9. If \( A=\left[\begin{array}{cc}x & -2 \\ 3 & 7\end{array}\right] \) and \( A^{-1}=\left[\begin{array}{cc}\frac{7}{34} & \frac{1}{17} \\ \frac{-3}{34} & \frac{2}{17}\end{array}\right] \), then the value of \( x \) is (a) 2 (b) 3 (c) \( -4 \) (d) 4

Monjur Alahi

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2025-01-04 04:42

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