Determine all the values of $x\in \mathbb{R}$ for which the series below converges$$\sum_{n=1}^\infty \frac{x^n}{1+n|x|^n} $$
I don't know how to approach these questions in general.
Determine all the values of $x\in \mathbb{R}$ for which the series below converges$$\sum_{n=1}^\infty \frac{x^n}{1+n|x|^n} $$
I don't know how to approach these questions in general.