Hello! I'm trying to solve some old exam exercises to prepare for my qm exam next week. Now I got a question I dont have any idea how to solve it. I hope somebody can help me: "The radial Schrödinger equation in the case of a 3D spherical symmetric potential V(r) can be written in the form -h^2/(2*m) * d^2u/dr^2 + [V(r) + (l*(l+1) / r^2)]*u = E*u where u(r) = r*R(r). If V is attractive and vanishes exponentially at infinity, how does u(r) behave asymptotically for bound states?" Thanks for helping!