Hey! I need some help again with series. I hate this topic lol

how would you do these problems

1. Finde the range of values for which the following series is convergent or divergent:

$\displaystyle \sum_{n=1}^{\infty}\frac{(n+1)}{n^3}x^n$

2. Investigate the convergence of the series

$\displaystyle \frac{1}{1.2}+\frac{x}{2.3}+\frac{x^2}{3.4}+\frac{ x^3}{4.5}+...$for$\displaystyle x>0$

sorry to flood you with questions, its because I have a test very soon on this.

and want to get a good mark

thank you!