Let A and B be two n × n matrices, they have thesame eigenvalues and n linear independent eigenvalues, then ( ).
未知类型:{'options': ['A is similar to B.', 'A [img=14x23]17de9331bc2f299.png[/img] B, but |A − B| = 0.', 'A = B.', 'A is not necessarily similar to B, but det(A)=det(B).'], 'type': 102}
未知类型:{'options': ['A is similar to B.', 'A [img=14x23]17de9331bc2f299.png[/img] B, but |A − B| = 0.', 'A = B.', 'A is not necessarily similar to B, but det(A)=det(B).'], 'type': 102}
举一反三
- Let A be a 2×2 matrix. If tr(A) = 8 and det(A) = 12,the eigenvalues of A is .
- Let A be a n×n matrix, then ( ) A: AAT =ATA. B: det(AAT ) = det(AT A). C: if det(A) = 0, then A is invertible. D: if det(A) = 0, then AT is invertible.
- 若A为n阶反对称矩阵(n为奇数), 则det A的值为( ). 未知类型:{'options': ['0', '1', '', '不确定'], 'type': 102}
- 已知N点有限长序列X(k)=DFT[x(n)],0≤n,k<N,则N点DFT[[img=48x34]1803a7ccfbb36d0.png[/img]x(n)]=( )。 未知类型:{'options': ['', '', '', ''], 'type': 102}
- 已知序列x(n)的DTFT为[img=60x28]17da6b518173e68.png[/img],则[img=119x49]17da6b51929727d.png[/img]等于( )。 未知类型:{'options': ['2πX(0)', '', '2π'], 'type': 102}