B =la a x 六、计算逆阵(8%) 1.A=110…1 l11 第4页第 4 页 2. n n a a a x a a x a a x a a x a a a B       = 3 2 1 六、计算逆阵（8%） 1.                       = 1 1 1 0 1 1 0 1 1 0 1 1 0 1 1 1 A