c
$\mathrm{f}(0)=\left|\begin{array}{ccc}0 & 1 & 1 \\ 2 & 0 & 6 \\ 0 & 4 & -2\end{array}\right|=12$
$f^{\prime}(x)=\left|\begin{array}{ccc}3 x^2 & 4 x & 3 \\ 3 x^2+2 & 2 x & x^3+6 \\ x^3-x & 4 & x^2-2\end{array}\right|+$
$\left|\begin{array}{ccc}x^3 & 2 x^2+1 & 1+3 x \\ 6 x & 2 & 3 x^2 \\ x^3-x & 4 & x^2-2\end{array}\right|+$
$\left|\begin{array}{ccc}\mathrm{x}^3 & 2 \mathrm{x}^2+1 & 1+3 \mathrm{x} \\ 3 \mathrm{x}^2+2 & 2 \mathrm{x} & \mathrm{x}^3+6 \\ 3 \mathrm{x}^2-1 & 0 & 2 \mathrm{x}\end{array}\right|$
$\begin{aligned} & \therefore \mathrm{f}^{\prime}(0)=\left|\begin{array}{ccc}0 & 0 & 3 \\ 2 & 0 & 6 \\ 0 & 4 & -2\end{array}\right|+\left|\begin{array}{ccc}0 & 1 & 1 \\ 0 & 2 & 0 \\ 0 & 4 & -2\end{array}\right|+\left|\begin{array}{ccc}0 & 1 & 1 \\ 2 & 0 & 6 \\ -1 & 0 & 0\end{array}\right| \\ & =24-6=18 \\ & \therefore 2 \mathrm{f}(0)+\mathrm{f}^{\prime}(0)=42\end{aligned}$