qqp question1: How I find the sum of this series? [math]\displaystyle \sum_{k=1}^{\infty} \frac 1 k \ln(\frac 1 k + 1)[/math] question2: How do you find a sum of series [math]\sum\limits_{k=0}^{\infty}\frac{(-1)^n}{n^23^n}[/math]?