Find the Sum of the Geometric Series for Those X $$\sum _ { n = 0 } ^ { \infty } ( 9 x + 1 ) ^ { n }$$

Multiple Choice

Find the sum of the geometric series for those x for which the series converges.
- $$\sum _ { n = 0 } ^ { \infty } ( 9 x + 1 ) ^ { n }$$

A) $- \frac { 1 } { 9 x }$
B) $\frac { 1 } { 9 x }$
C) $\frac { 1 } { 1 - 9 x }$
D) $\frac { 1 } { 1 + 9 x }$