has singularities $z=0, z=-1$ right?
How can I determine the type of singularity of this points?
1.)Removable pole (Then $f(z_0)$ is bounded, $f(z)$ has a limit if $z \to \infty$
2.) Pole of order $m \implies |f(z)|\to \infty $ as $z \to z_0$
3.) Essential singularity : not bounded, does not go to infinity.
(Another way to descibre is to look at the coefficients of the Laurent Series.