Nonlinear discrete-Time System On the other hand ayiIn+By2ln =a{x[n]-x[n-1]x[n+1]} +B{x2[m]-x2[n-1x2[n+1} ≠y{n] Hence, the system is nonlinear Copyright C 2001, S K MitraCopyright © 2001, S. K. Mitra 14 Nonlinear Discrete-Time System • On the other hand • Hence, the system is nonlinear y [n] y [n]  1 +  2 { [ ] [ 1] [ 1]} 1 1 2 = x1 n − x n − x n + { [ ] [ 1] [ 1]} 2 2 2 +  x2 n − x n − x n +  y[n]