查看原题
设向量组 $\alpha_1=\left(\begin{array}{c}2 \\ -1 \\ 1\end{array}\right), \alpha_2=\left(\begin{array}{c}3 \\ 1 \\ -1\end{array}\right), \alpha_3=\left(\begin{array}{l}0 \\ 3 \\ \lambda\end{array}\right)$ 线性相关，则 $\lambda=$
                        
不再提醒