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+//Example 2.7
+clc
+disp("The frequency of the oscillator is given by,")
+disp("  f = 1 / 2*pi*sqrt(R1*R2*C1*C2)")
+disp("For    f = 10 kHz,")
+r2=(1/(4*(%pi^2)*(100*10^6)*(10*10^3)*(0.001*10^-12)))  // in k-ohm
+format(6)
+disp(r2,"Therefore,  R2(in k-ohm) =")
+disp("For    f = 50 kHz,")
+r2=(1/(4*(%pi^2)*(2500*10^6)*(10*10^3)*(0.001*10^-12)))  // in k-ohm
+format(6)
+disp(r2,"Therefore,  R2(in k-ohm) =")
+disp("So minimum value of R2 is 1.013 k-ohm while the maximum value of R2 is 25.33 k-ohm")