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+// Exa 2.4
+
+clc;
+clear;
+
+// Given
+
+// Transistor Colpitts oscillator
+L = 100*10^-3; // Inductance(H)
+C1 = 0.005*10^-6; // Capacitor(F)
+C2 = 0.01*10^-6; // Capacitor(F)
+
+// Solution
+
+C = C1*C2/(C1+C2);
+printf(' By calculation, C = %.2f pf \n',C*10^12);
+fo = 1/(2*%pi*sqrt(L*C));
+
+printf('  The frequency of oscillator = %.1f kHz \n',fo*10^-3);
+
+// The answer provided in the textbook is wrong