Find a General Term A_n for the Geometric Sequence $$a _ { 1 } = \frac { 1 } { 6 } , r = - 3$$

Multiple Choice

Find a general term a_n for the geometric sequence.
- $$a _ { 1 } = \frac { 1 } { 6 } , r = - 3$$

A) $a _ { n } = \frac { 1 } { 6 } - \frac { 1 } { 3 } ( n - 1 )$
B) $a _ { n } = \frac { 1 } { 6 } - \frac { 2 } { 9 } ( n - 1 )$
C) $a _ { n } = \left( \frac { 1 } { 6 } \right) ^ { n - 1 }$
D) $a _ { n } = \frac { 1 } { 6 } \cdot ( - 3 ) ^ { n - 1 }$