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diff --git a/Working_Examples/154/CH9/EX9.11/ch9_11.sce b/Working_Examples/154/CH9/EX9.11/ch9_11.sce
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+clc
+disp("Example 9.11")
+printf("\n")
+
+//From figure 9.16
+//H(s)=V(s)/I(s)=Z(s)
+//Let V(s)=1 the H(s)=Z(s)
+s=%s
+z1=(1/2.5)+(3/(5*s))+(s/20)
+Z=1/z1
+Dem=Z('den')
+//The roots are
+q=roots(Dem)
+disp(q,"Poles are")
+
+