1.
If f(x)=∣x32x2+11+3x3x2+22xx3+6x3−x4x2−2∣f(x)=\begin{vmatrix} x^{3} & 2x^{2}+1 & 1+3x \\ 3x^{2}+2 & 2x & x^{3}+6 \\ x^{3}-x & 4 & x^{2}-2 \end{vmatrix} for all x∈Rx\in\mathbb{R}, then 2f(0)+f′(0)2f(0)+f'(0) is equal to: