名前: 奥村晴彦 日時: 2003-09-09 20:05:40 IPアドレス: 210.236.176.*
>>21658 とりあえず最小限の変更です。 前問より \begin{eqnarray*} & & (4a+b) \left| \begin{array}{cccc} 1 & a & a & a\\ 1 & a+b & a & a\\ 1 & a & a+b & a\\ 1 & a & a & a+b\\ \end{array} \right| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \\ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% &=& (4a+b) \left[(-1) ^{1+1} \left| \begin{array}{ccc} a+b & a & a\\ a & a+b & a\\ a & a & a+b\\ \end{array} \right| + (-1) ^{2+1} \left| \begin{array}{ccc} a & a & a\\ a & a+b & a\\ a & a & a+b\\ \end{array} \right| \right. \\ & &\qquad\qquad{} + (-1) ^{3+1} \left. \left| \begin{array}{ccc} a & a & a\\ a+b & a & a\\ a & a & a+b\\ \end{array} \right| + (-1) ^{4+1} \left| \begin{array}{ccc} a & a & a\\ a+b & a & a\\ a & a+b & a\\ \end{array} \right| \; \right] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \\ %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% &=& ... \end{eqnarray*}
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