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[单选题]
设方阵A可逆,则下列命题中不正确的是().
A.A≠O
B.线性方程组AX=O必有非零解
C.|A|≠0
D.矩阵A'可逆
查看答案
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A.A≠O
B.线性方程组AX=O必有非零解
C.|A|≠0
D.矩阵A'可逆
A、(A+B)+C=A+(B+C)
B、(AB)C=A(BC)
C、AB=BA
D、A(B+C)=AB+AC
A.A*A=AA*
B.A^2*A^3=A^3*A^2
C.(A-E)*(A+E)=(A+E)*(A-E)
D.AA^T=A^TA
A.[x,y]=[y,x]
B.[x,y]=0⇆x,y正交
C.[λx,λy]=λ[x,y]
D.[x+y,z]=[x,z]+[y,z]