Optimality of in Prob. 2 Choose x0 = [3 1]t and show that q = 0

Optimality of δ in Prob. 2 Choose x0 = [3 – 1]t and show that q = 0 and δ = 1 for all steps and that the Eigen values are ±1, so that the interval [q – δ, q + δ] cannot be shortened in general! Experiment with other x0.