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+// Exa 5.28
+clc;
+clear;
+close;
+// Given data
+A=2000;//V/V
+Bita= 0.1;// inV/V
+Ri= 1;// in kohm
+Ri= Ri*10^3;// in ohm
+Ro= 1;// in kohm
+Ro= Ro*10^3;// in ohm
+Af= A/(1+A*Bita);
+disp(Af,"The gain Af in volt is : ")
+Rif= Ri*(1+A*Bita);// in ohm
+disp(Rif*10^-3,"The input resistance in kohm is : ")
+Rof= Ro/(1+A*Bita);// in ohm
+disp(Rof*10^-3,"The output resistance in kohm is : ")
+
+
+// Note: In the book, to finding the value of Af, Rif and Rof there is missprinting to putting the value of Bita but value of Af and Rif is correct because to calculating Af and Rif , the value of Bita is taken .1 (not .01)
+//          but to evaluating the value of Rof calculation is also wrong so the answer in the book is wrong