2/5 - 数学演習II

次の計算をせよ

${\rm det}\left( \begin{array}{cc} 2 & 7 \\ 1 & 8 \end{array} \right)=$ 2*8-7*1 = 9
${\rm det}\left( \begin{array}{ccc} 9 & 2 & 6\\ 3 & 5 & 8\\ 7 & 9 & 3 \end{array} \right)=$ -467
${\rm det}\left( \begin{array}{ccc} 1 & 4 & 1\\ 3 & 5 & 8\\ 7 & 9 & 3 \end{array} \right)=$ 123
${\rm det}\left( \begin{array}{ccc} 1 & 4 & 1\\ 9 & 2 & 6\\ 7 & 9 & 3 \end{array} \right)=$ 79
${\rm det}\left( \begin{array}{ccc} 1 & 4 & 1\\ 9 & 2 & 6\\ 3 & 5 & 8\\ \end{array} \right)=$ -191
${\rm det}\left( \begin{array}{cccc} 3 & 1 & 4 & 1\\ 5 & 9 & 2 & 6\\ 5 & 3 & 5 & 8\\ 9 & 7 & 9 & 3 \end{array} \right)=$ 98