[理工] [線代]
1.Suppose the only eigenvectors of a 3*3 matrix A are multiples of X=[1,0,0]^T
,then A is not invertible.
Ans: False
這題題目有點看不懂,是否可以解釋一下
2.A real symmetric square matrix A can be factored into A=(Q^T)DQ
,in which D is diagonal and Q is orthogonal.
Ans:True
我認為的 A=QD(Q^T) 與題目有點不相同,還是兩者都可以?
請各位幫我解說,謝謝!
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