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## Homework Statement

I got the the radial part of the Laplace-Equation:

[itex]r^2(\frac{d^2}{dr^2}U(r))=l(l+1)U(r)[/itex]

Now I should show that the following solves the equation:

[itex]a_l*r^l+\frac{b_l}{r^l}[/itex]

## The Attempt at a Solution

The problem is that I got l(l-1) instead of l(l+1) :(