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//Example 4.9
//MAXIMA SCILAB TOOLBOX REQUIRED FOR THIS PROGRAM
clear;
clc ;
close ;
syms a n Z;
x1=a^n; //for all n>=0
X1=Z/(Z-a); //ROC is mod(Z)>a
x2=x1(n-2);
//Time shifting property
X2=[Z^(-2)]*X1;
//Display the result in command window
disp (X2,"Z-transform of x(n-2) is:");
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