$[-/1$ Points$]$

LARCALCET$79\mathrm{.}2\mathrm{.}030.$

Find the sum of the convergent series.

${\displaystyle \underset{n=0}{\overset{}{}}}(-\frac{4}{5}{)}^n$

$[-/1$ Points$]$

LARCALCET$79\mathrm{.}2\mathrm{.}031.$

Find the sum of the convergent series.

${\displaystyle \underset{n=1}{\overset{}{}}}\frac{8}{n(n+2)}$

$[-/1$ Points$]$

LARCALCET$79\mathrm{.}2\mathrm{.}033.$

Find the sum of the convergent series.

$4+2+1+\frac{1}{2}+$dots