題組內容

3 Let $A \in M_{n \times n}(\mathbb{R})$ be a symmetric matrix

b. (10) If \( \lambda{1} \) and \( \lambda{2} \) are distinct eigenvalues of \( A \) associated eigenvectors \( x{1} \) and \( x{2} \), then \( x{1} \) and \( x{2} \) are orthogonal.