• 试题 ID 29892


若 $A =\left(\begin{array}{llll}0 & 1 & 1 & 1 \\ 0 & 0 & 1 & 1 \\ 0 & 0 & 0 & 1 \\ 0 & 0 & 0 & 0\end{array}\right)$ 则 $A ^4=$ $\qquad$
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答案:

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解析:

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