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diff --git a/Working_Examples/154/CH7/EX7.22/ch7_22.sce b/Working_Examples/154/CH7/EX7.22/ch7_22.sce
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+clc
+disp("Example 7.22")
+printf("\n")
+
+//The general equation of exponential decay function is given by
+disp("v(t)=A*e(-t/T)+B")
+//We need to solve A and B
+//At t=0 we get v(0)=A+B    (1)
+//at t=inf we get B=1       (2)
+//Solving (1) and (2)
+A=4;B=1;
+T=3;
+t=0:0.05:10
+v=4*exp(-t/T)+1;
+figure
+a= gca ();
+plot(t,v)
+xtitle ('v vs t','t','v');
+a. thickness = 2;
+