b 例16计算D a, a2+b, ≠ a,+b, 解采用加边法 a1+b1 D= a-aa 0 +b aa a ti aa 0:b0 0b2 0=0:0b2 0 1:00 bn0:00…bn 1b2b=b…b1+4+2 b 课后作业:习题一8,919 例 16 计算 n n n n n a a a b a a b a a b a a D + + + = 1 2 1 2 2 1 1 2 ( 0) bi . 解 采用加边法. n n n n n n a a a b a a b a a b a a a a a D + + + = 1 2 1 2 2 1 1 2 1 2 0 0 0 1 n n b b b a a a 1 0 0 1 0 0 1 0 0 1 2 1 1 2 − − − = n n b b b t a a a 0 0 0 0 0 0 0 0 0 2 1 1 2 = b b bn b b bn = t 1 2 = 1 2 + + + + n n b a b a b a 2 2 1 1 1 课后作业:习题一 8,9