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+// Exa 8.2
+clc;
+clear;
+close;
+format('v',6)
+// Given data
+Av = 80;// overall voltage gain in dB
+Av2 = 20*log10(150);// voltage gain of second stage in dB
+Av1= Av-Av2;//voltage gain of first stage in dB
+disp(Av1,"The voltage gain of first stage in dB is");