高斯顺序消去法 ,(2)_a(1) (i=2,…,n,j=2,,n) b2)=bo-b(高斯顺序消去法 . ( 2,..., ) ( 2,..., ; 2,..., ) (1) (1) 1 1 1 (1) (1) 1 1 (1) 1 (2) (1) (1) 1 1 (1) 1 (1) (1) 1 (1) 1 1 (2) (1) b i n a a b b b b l i n j n a a a a a a l a i i i i i i j i j i j i j i j = − = = − = − = = = −