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lenamhvtc

lenamhvtc

Member Since 14-10-2018
Offline Last Active 26-02-2019 - 17:44
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In Topic: Tính định thức cấp 4

31-10-2018 - 07:20

A=$\begin{pmatrix} 1 &2 &3 &4 \\ 2 &1 &2 &1 \\ 1 &1 &m &2 \\ 2 &2 &1 &m \end{pmatrix}$