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diff --git a/67/CH1/EX1.22/example122.sce b/67/CH1/EX1.22/example122.sce
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+//Example 1.22
+clc;
+x1=[1,1,1,1]
+x2=[2,2,2,2]
+a1=1
+b1=1
+Wc=%pi
+for t=1:length(x1)
+    x3(t)=a1*x1(t)+b1*x2(t)
+end
+for t=1:length(x1)
+    y1(t)=x1(t)*cos(Wc*t)
+    y2(t)=x2(t)*cos(Wc*t)
+    y3(t)=x3(t)*cos(Wc*t)
+end
+for t=1:length(y1)
+    z(t)=a1*y1(t)+b1*y2(t)
+end
+count=0
+for n=1:length(y1)
+    if(y3(t)==z(t))
+        count=count+1;
+     end   
+end
+if(count==length(y3))
+disp('It satisfy the superposition principle');
+disp('THE GIVEN SYSTEM IS LINEAR ');
+else
+    disp('It does not satisfy superposition principle ');
+    disp('THE GIVEN SYSTEM IS NON LINEAR');
+end
+\ No newline at end of file