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34. Let， which of the following sta..-阿摩線上測驗
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34. Let 
， which of the following statement is incorrect?
(A) The rank of A is 3.
(B) The inverse matrix is 
(C) If we define the characteristic polynomial of A is f(t)=det(A-tIn), then
f(1)=-t3+3t2+3t-1.
(D) One of the eigenvalues is -1 and the corresponding eigenvector is (-2, 1, 2)T.
(E) The matrix cannot be diagonalized over the real field.