1. The problem statement, all variables and given/known data Consider a perturbed hydrogen atom whose Hamiltonian, in atomic units, is: H= -1/2(∆^2) – ½ + b/(r^2) (∆ should be upside down), where b is a positive constant. The Schrodinger equ. for this hamiltonian can be solved exactly for the energy eigenvalues. The results for the ground state is: E = -1/[2(B^2)], where B = [1 + (1 + 8b)^(1/2)]/2. Use first-order perturbation theory in which the perturbation is b/(r^2) to compute the ground-state energy of the purturbed system for b=0.01, b=0.10, b=0.50, b=1.0, and b=10.0. 2. Relevant equations 3. The attempt at a solution I am not sure how to start this problem. Any hints to get me started?