For which value of x, will the matrix given below become singular?

$⎡ ⎢ ⎣ \begin{matrix} 8 & x & 0 4 & 0 & 2 12 & 6 & 0 \end{matrix} ⎤ ⎥ ⎦$

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Solution

The correct option is A 4
For matrix to be singular, |A|=0
8(0 - 12) - x (0 - 24 ) = 0
x = 4

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