initial commit / add all books

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+// Exa 7.15

+clc;

+clear;

+close;

+format('v',5)

+// Given data

+R1 = 20;// in k ohm

+R1 = R1 * 10^3;// in ohm

+R2 = R1;// in ohm

+R = R1;// in ohm

+C1 = 1000;// in pF

+C1 = C1 * 10^-12;// in F

+C2 = C1;// in F

+C = C1;// in F

+f = 1/(2*%pi*R*C);// in Hz

+f= f*10^-3;// in kHz

+disp(f,"The frequency of oscillations in kHz is");