数学试题讲解

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证明：

| \begin{array}{cccc} x & - 1 & 0 & 0 \\ 0 & x & - 1 & 0 \\ 0 & 0 & x & - 1 \\ a_{0} & a_{1} & a_{2} & a_{3} \end{array} | = a_{3} x^{3} + a_{2} x^{2} + a_{1} x + a_{0}