EMLA Q.59

59For which value of x, will the matrix

For which value of x, will the matrix

become singular

Option : A
Explanation : For singular matrix,
$\Rightarrow$ 8 [0 - 12] - x [0 - 2x12] = 0
$\Rightarrow$ -96 + 24x = 0
$\Rightarrow$ x = 4

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