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diff --git a/1217/CH4/EX4.5/Exa4_5.sce b/1217/CH4/EX4.5/Exa4_5.sce
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+//Exa 4.5
+clc;
+clear;
+close;
+disp("The given circuit is basically an inverting amplifier with node A at virtual ground. Writing KCL at node A yields ");
+disp("I1+I2=If");
+disp("-2/10Kohm+3/20Kohm=-Vo/100Kohm");
+Vo=-(-20+15);//in Volts
+disp(Vo,"Output voltage in Volt is : ")
+\ No newline at end of file