Problem $14.(1$ point$)$

Determine whether the following alternating series are absolutely convergent, conditionally convergent, or divergent. Answer "Absolutely Convergent", "Conditionally Convergent", or "Divergent".

$1.{\displaystyle \underset{n=1}{\overset{}{}}}\frac{(-1{)}^{n-1}}{4n-5}$

$2.{\displaystyle \underset{n=1}{\overset{}{}}}(-1{)}^n\frac{3n}{7n^2+1}$

$3.{\displaystyle \underset{n=1}{\overset{}{}}}(-1{)}^{n+1}\frac{2-5n}{n^3+6}$

Note: You only have two attempts at this problem.