求一通解为 $\left(\begin{array}{l}x_1 \\ x_2 \\ x_3 \\ x_4\end{array}\right)=c_1\left(\begin{array}{l}-1 \\ 1 \\ 1 \\ 1\end{array}\right)+c_2\left(\begin{array}{l}2 \\ 0 \\ 0 \\ 2\end{array}\right)+\left(\begin{array}{l}1 \\ 9 \\ 9 \\ 8\end{array}\right),\left(c_1, c_2 \in R\right)$ 的非齐次线性方程组.
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