1) The value of the determinant Δ = $\begin{vmatrix}1 & 4& 3 \\0 & 12 & 9\\1 & 2 & 2 \end{vmatrix}$ is A) 2 B) 4 C) 6 D) 8 Answer: Option CExplanation:Δ = $\begin{vmatrix}1 & 4& 3 \\0 & 12 & 9\\1 & 2 & 2 \end{vmatrix}$ = 1(12 x 2 -2 x 9)-4 (0 x 2 - 1 x 9) + 3(0x 2 - 1 x12) = 1(24 - 18) - 4(0 - 9) + 3(0 - 12) = 6 +36 - 36 = 6
