Laplace's equation written in plane polar coordinates $\displaystyle (r,\theta)$ is

$\displaystyle T_{rr} + \frac{1}{r}T_r + \frac{1}{r^2}T_{\theta \theta} = 0$

I need to find the most general solution $\displaystyle T(r)$ which is a function of $\displaystyle r$ only.

Can anyone see what this would be?