Convergence & divergence of geometric series  Sequence and series
Convergence & divergence of geometric series
Lessons
Notes:
Formulas for Geometric Series:
$\sum_{n=0}^{\infty}ar^n=\frac{a}{1r}$ if 1 < $r$ < 1
$\sum_{n=1}^{\infty}ar^{n1}=\frac{a}{1r}$ if 1 < $r$ < 1
If 1 < $r$ < 1, then the geometric series converges. Otherwise, the series diverges.

2.
Convergence of Geometric Series
Show that the following series are convergent and find its sum: 
3.
Divergence of Geometric Series
Show that the following series are divergent: