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diff --git a/758/CH8/EX8.2/Ex_8_2.sce b/758/CH8/EX8.2/Ex_8_2.sce
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+//Example 8.2
+clc;clear;close;
+s=poly(0,'s');
+z=poly(0,'z');
+T=1;
+Hs=1/(s^2+16);
+Hz=horner(Hs,(1-1/z)/T);
+disp('Using Backward difference formula for derivative:')
+disp(Hs,'H(s)=');
+disp(Hz,'H(z)=');
+\ No newline at end of file