討論串[理工] [線代]交大100
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true false. observe (A^2 - I)v = AAv - v. = A(1v) - v. = 1(v) - v. = 0. since (A^2 - I) has zero eigenvalue. (A^2 - I) is not invertible. true. for an
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9.Suppose A:3x3 has three distinct eigenvalues 0,1,3 with corresponding. eigenvectors u,v,w. 何者敘述正確. A.The rank of A must be 2. B.The matrix A^2-I is
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