8. 已知 $f(x)=x^{2}+2 x f^{\prime}(1)$, 则 $f^{\prime}(0)=$ \$ \qquad \$ .
：$\because f^{\prime}(x)=2 x+2 f^{\prime}(1)$,

$$
\begin{aligned}
& \therefore f^{\prime}(1)=2+2 f^{\prime}(1), \quad \therefore f^{\prime} \quad(1)=-2 \\
& \therefore f^{\prime}(x)=2 x-4, \quad \therefore f^{\prime}(0)=-4
\end{aligned}
$$

答案 ：-4