Binding Energy given a function? (1 Viewer)

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1. The problem statement, all variables and given/known data
The binding energy of a two-particle system is defined as the energy required to separate the two particles from their state of lowest energy to r=infinity. The potential energy of the two atoms in a diatomic (two-atom) molecule can be written
U(r)=-a/(r^6)+b/(r^12)
where r is the distance between the two atoms and a and b are positive constants.
Determine the binding energy. (in terms of a and b)

2. Relevant equations

3. The attempt at a solution

I don't even know where to start.. do i take the derivative of U(r) and find the minimum value of r and plug that in which would be the binding energy?
 

fzero

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Basically, find Umin and Umax. Use the definition given to determine the binding energy.
 

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