For the matrix A=(210032001)A = \begin{pmatrix} 2 & 1 & 0 \\ 0 & 3 & 2 \\ 0 & 0 & 1 \end{pmatrix}A=200130021, the spectral radius ρ(A)=maxi∣λi∣\rho(A) = \max_i |\lambda_i|ρ(A)=maxi∣λi∣ is:
111
222
333
666