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disp("E(r) = A*r^-6 + B*r^-12");
disp("dE(r)/dr = 6*A*r^-7 - 12*B*r^-13");
A=8*(10^-77);B=1.12*(10^133);
r0=3.75;
e=1.6*10^-19;
Eb=((-A)*(r0^(-6)))+(B*(r0^(-12)));
b=Eb*10^-126;
printf('\n The value of binding energy is %f*10^-20J',b);
c=b/e*10^-20;
printf('\n The value of binding energy is %fJ',c);
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