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+//Chapter 15, Example 15.7
+
+clc
+//Initialisation
+g=2*10**5                   //open loop gain
+g2=1                       //closed loop gain
+ro=75                        //ouput resistance
+ri=2*10**6                   //input resistance
+
+//Calculation
+ab=g/g2                      //1 + AB
+ro2=ro/ab                    //output resistance in ohm
+ri2=ri*ab                    //input resistance in ohm
+
+//Results
+printf("Output Resistance = %.1f uOhm\n",ro2*10**6)       //wrong answerin textbook
+printf("Input Resistance = %d GOhm",ri2/10**9)
+
+