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diff --git a/3774/CH1/EX1.4/Ex1_4.sce b/3774/CH1/EX1.4/Ex1_4.sce
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+// exa 1.4 Pg 15
+clc;clear;close;
+Pmax=50;// kW
+Pmin=5;// kW
+z=4;// no. of models
+
+//Rn=Pmax/Pmin=fi**(z-1)
+fi=(Pmax/Pmin)**(1/(z-1));// common ratio
+
+printf('The models are:')
+
+for i=0:z-1
+    P1=fi**(i)*Pmin;// kW
+    printf('\n\t\t\tP%d = %.1f kW',i,P1)
+end;
+
+printf('\n for 8 models.')
+
+z=8;// no. of models
+
+//Rn=Pmax/Pmin=fi**(z-1)
+fi=(Pmax/Pmin)**(1/(z-1));// common ratio
+
+printf('The models are:')
+
+for i=0:z-1
+    P1=fi**(i)*Pmin;// kW
+    printf('\n\t\t\tP%d = %.1f kW',i,P1)
+end;