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diff --git a/2303/CH3/EX3.1/EX_3_1.sce b/2303/CH3/EX3.1/EX_3_1.sce
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+//Ex.3.1
+clc;
+clear;
+close;
+x1=[1 2 3 4];         //assume
+x2=[1 2 1 2];         //assume
+a=1;
+b=1;
+y=[2 2 2 2];          //y(n)=2 for all x
+
+//Test for homogeneity
+k=2;
+hom=0;
+for n=1: length (x1)
+    if (k*y(n)==k*x1(n))
+        hom=hom+1;
+    end
+end
+
+//Test for additivity
+for n =1: length (x1)
+    x3(n)=a*x1(n)+b*x2(n)
+end
+for n =1: length (x1)
+    y1(n)=2;
+    y2(n)=2;
+    y3(n)=2;
+end
+for n =1: length (y1)
+    z(n)=a*y1(n)+b*y2(n);
+end
+count =0;
+for n =1: length (y1)
+    if(y3(n)==z(n))
+    count = count +1;
+    end
+end
+if( count == length (y3) & (hom==length(y)))
+    disp ( 'It satisfies the homogeneity and additivity principle' );
+    disp ( 'THE GIVEN SYSTEM IS LINEAR ' );
+else
+    disp ( 'It does not satisfy the homogeneity and additivity principle' );
+    disp ( 'THE GIVEN SYSTEM IS NON LINEAR ' );