系数矩阵与常数项 C1C12C13∴a1n (2)(2) (2) a2 a C 00a23… bbb 000 C 计算出Am/,bm的过程称消去过程(1) (1) (1) (1) (1) 11 12 13 1 1 (2) (2) (2) (2) 22 23 2 2 ( ) (n) (3) (3) (3) 33 3 3 ( ) ( ) 0 0 0 0 0 0 b n n n n n n nn n a a a a b a a a b A a a b a b                 = =                     ， 系数矩阵与常数项： 计算出 A ( n ) ， b ( n ) 的过程称消去过程