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Eigenvalues & Eigenvectorseasy
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A 3×33 \times 33×3 matrix has eigenvalues λ1=2\lambda_1 = 2λ1​=2, λ2=3\lambda_2 = 3λ2​=3, and λ3=−1\lambda_3 = -1λ3​=−1. What is trace(A)\text{trace}(A)trace(A)?