Question: A discrete time system is given by y [ n + 1 ] - 0 . 8 y [ n ] = x [ n

A discrete time system is given by y[n+1]-0.8y[n]=x[n+1] with input x[n]=cos(n)u[n] being the sampled signal of x(t)=cos(1500t) with the sampling interval T=1ms. In the steady state, the amplitude of the output y[n] is close to

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