00 d b0 0 d-b b-do 0 d-b b-d 100 1b10 解 00|01+aba 1b10|-1b100-1 11|0-1 0-1 0 1+ab a 00 ab a+c 1dl00 1 b 0 1 b 0 00 a+c+abc 1+ab0 0 00 00 a+c+abc 1+ab 1 b 1+abad t dc +abcd 00-1 000 1+ab+d(a+c+abc 7计算下列各行列式 x+(n-1)ax+(n-1) x+(n-1)a [x+(n-l)a] [x+(n-l)a] =(x-ax+(n-1)a] 00 x-a㾷˖ 00 00 00 00 0 00 0000 cad b caac caac acd b dbbd dbbd ac bd acca cabd c a b d c a b d -- -- -- -- === - - 4) 1 00 1 10 01 1 00 1 a b c d - = - - 㾷˖ 1 0 0 01 0 1 1 0 1 1 0 1 10 1 10 0 1 1 0 1 1 0 1 1 0 1 1 01 0 0 1 00 1 0 0 1 0 0 1 00 1 1 1 01 1 0 01 1 01 1 00 1 00 1 00 1 00 1 11 0 01 1 1 00 1 0 0 01 ( ) a ab a b b bb cc c c ab a ab a c d d dd b b c c a c abc ab d d a c abc ab b c ab ad dc abcd d ab d a c abc +- - -- - - === -- + + - - -- - - - - = =- ++ + - - ++ + - - =- = + + + + - + + ++ 7.䅵ㅫϟ߫৘㸠߫ᓣ 1) ... ... ... ... ... ... ... xa a ax a aa x = 1 2 1 ... ( 1) ( 1) ... ( 1) 1 1 ... 1 ... ... ... [ ( 1) ] ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 1 1 ... 1 0 ... 0 [ ( 1) ] ( ) [ ( 1) ] ... ... ... ... 0 0 ... n i i r r n xa a x n ax n a x n a ax a a x a ax a xn a aa x a a x aa x x a x n a xa x n a x a = + - +- +- +- å = =+- - =+- =- +- -