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+//pagenumber 399 example 1
+clear
+freque=5*10^3;//hertz
+//(1)
+g=2*10^-3;//ampere per volt
+rd=10*10^3;//ohm
+r1=30*10^3;//ohm
+r12=r1*r1/(r1+r1);
+volgai=-(g*r12*rd)/(r12+rd);
+disp("voltage gain   =   "+string((volgai)));//correction r12 should be taken as 15*10^3ohm in book
+//(2) capacitance included
+c=0.025*10^-6;//farad
+frequ1=1/((2*3.14*(((rd*r1)/(rd+r1))+r1))*c);
+volgai=(volgai/(sqrt((1+(frequ1/freque)^2))));
+
+disp("voltage gain   =   "+string((volgai)));
+
+
+