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+//Example 2-12-c
+clc ;
+t0 =1;
+T =10;
+c=2;
+for t =1: T
+x ( t ) =t;
+y ( t ) =3*(x(t))^(2);
+end
+inputshift = 3*(x(T - t0))^(2)
+outputshift = y (T - t0 )
+if( inputshift == outputshift )
+disp ( 'THE GIVEN SYSTEM I S TIME INVARIANT ' );
+else
+disp ( 'THE GIVEN SYSTEM I S TIME VARIANT ' ) ;
+end
+