Eigenvalues & Eigenvectorshard
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For a symmetric matrix AA with eigenvalues 0<λ1λ2λn0 < \lambda_1 \leq \lambda_2 \leq \cdots \leq \lambda_n, the Rayleigh quotient is R(x)=xTAxxTxR(x) = \frac{x^T A x}{x^T x}. Which statement is true for any nonzero vector xx?