线性代数讨论-2X1+X2+X3=-2 X1-2X2+X3=K X1+X2-2X3=K^2的解的情况,有唯一解,无解和无穷多解(通解)
问题描述:
线性代数讨论-2X1+X2+X3=-2 X1-2X2+X3=K X1+X2-2X3=K^2的解的情况,有唯一解,无解和无穷多解(通解)
答
A =[ -2,1,1,-2][ 1,-2,1,k][ 1,1,-2,k^2]交换第1,3行A =[ 1,1,-2,k^2][ 1,-2,1,k][ -2,1,1,-2]r2-r1;r3+2r1A =[ 1,1,-2,k^2][ 0,-3,3,k - k^2][ 0,3,-3,2*k^2 - 2]r3+r2A =[ 1,1,-2,k^2][ 0,-3,3,k - k^2][ 0,0,0,k...