2. Consider a second-order discrete-time system described by [x1 (k+1)] x2 (k+ = (k) + u(k), 0 < < 1, 0 < 2 <1

2. Consider a second-order discrete-time system described by [x1 (k+1)] x2 (k+ = (k) + u(k), 0 < < 1, 0 < 2