(2n-1)24... (2n) ;-|||-(6) ... (2n-1)(2n)(2n-2)... 2.-|||-3.写出四阶行列式中含有因子a11a23的项.-|||-4.计算下列各行列式:-|||-4 1 2 4-|||-(1) 10 5 2 0 ;-|||-1 2 0 2-|||-0 1 1 7-|||-2 1 4 11-|||-3 -1 2 1-|||-(2) ;-|||-1 2 3 2-|||-5 0 6 2-|||--ab ac ae-|||-(3) bd -cd de ;-|||-bí cí ef-|||-1 1 1-|||-(4) a b-|||-b+c c+a a+b-|||-a 1 0 0 1-|||-(5) -1 b 1 0-|||-0 -1 c 1-|||-0 0 -1 d-|||-1 2 3 4-|||-1 3 4 1-|||-(6)-|||-1 4 1 2-|||-11 2 31-|||-5.求解下列方程:

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