利用克拉默法则解下列方程组x1+x2-2x3=-2 x2+2x3=1 x1-x2=2
问题描述:
利用克拉默法则解下列方程组x1+x2-2x3=-2 x2+2x3=1 x1-x2=2
答
x1+x2-2x3=-2
x2+2x3= 1
x1-x2 = 2
系数行列式:D=6
D1=6 D2=-6 D3=6
x1=D1/D=6/6=1
x2=D2/D=-6/6=-1
x3=D3/D=6/6=1