同理可得 -2-2 1 1 -21 D1= 1 1 -3=-5,D2=2 1-3 =-10, 0 1 -1 -1 0 -1 1 -2 -2 D3= 2 1 1 =-5, -1 1 0 故方程组的解为： X1 D=1, X2= X3= D=1.同理可得 0 1 1 1 1 3 2 2 1 1 − − − − D = = −5, 1 0 1 2 1 3 1 2 1 2 − − − − D = = −10, 1 1 0 2 1 1 1 2 2 3 − − − D = = −5, 故方程组的解为: 1, 1 1 = = D D x 2, 2 2 = = D D x 1. 3 3 = = D D x