無年度 - 主題課程_對角化：特徵值、特徵向量、特徵空間#107848

(5%) Which of the following is an eigenvector of A =? (A) x=；(B) x= ；(C)x=；(D) x=； (E) None of the above.

 Let A . Which of the following statements are true? (A) If A is singular, then O is an eigenvaluc of A. (B) A and A^T share the same eigenvalues and eigenvectors. (C) If A is diagonalizable, then A has n distinct eigenvalues. (D) Suppose that A is nonsingular. The condition Ax = λλx implies (E) Suppose that all the eigenvalues of A are real and positive. Then we have det( A ) ＞ 0.

 .(10%) For the matrix below, which of the following are correct?(A)-1 is its eigenvalue. (B) 1 is its eigenvalue. (C)-3 is its eigenvalue. (D)Zero vector belongs to its eigenvector. (E)[1 0 2]^T is a basis of its eigenspace.

(5%) Which of the following are correct? (A) An eigenvalue of a matrix has infinite number of eigenvectors. (B) If det(A -λl_n) = O, λ is the eigenvalue of n x n matrix A. (C) IfA is the cigenvalue of matrix A, the columns of (A - λIn) are independent. (D) Ifa is the eigenvalue of matrix A, there exist a non-zero vector V such that Av = av. (E) The number of the eigenvalue of n x n matrix A may larger than n.