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diff --git a/692/CH6/EX6.11/P6_11.sce b/692/CH6/EX6.11/P6_11.sce
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+//EXAMPLE 6.11
+//Inverse Z-transform
+clc;
+clear;
+syms n z1;
+z  = %z;
+num = z;      //given |z|>1;
+den = (z-1)^2;
+
+
+//Power series expansion
+x=ldiv(num,den,20);
+disp(x,'x = ');
+disp('x = n*u[n]');
+\ No newline at end of file