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CUET
-- Mathematics - Section A
Matrices
If $\begin{vmatrix}3 & x\\x & 1\end{vmatrix}=\begin{vmatrix}3 & 2\\4 & 1\end{vmatrix},$ then x is equal to :
$2\sqrt{2}$
$-2\sqrt{2}$
$±2\sqrt{2}$
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