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+// Exa 10.7
+clc;
+clear;
+close;
+format('v',6)
+// Given data
+dAbyA = 10/100;
+A = 200;
+Beta = 0.25;
+// Af = A/(1+(A*Beta)) (i)
+// differentiating w.r.to A we get, dAf = dA/((1+(Beta*A))^2) (ii)
+// From eq(i) and (ii)
+dAfbyAf = 1/(1+A*Beta)*dAbyA
+disp(dAfbyAf,"The small change in gain is");