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

Multiple Choice

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

A) $a _ { n } = 3 ( 3 ) ^ { n - 1 }$
B) $a _ { n } = 3 + 6 ( n - 1 )$
C) $a _ { n } = 3 ( 3 ) ( n - 1 )$
D) $a _ { n } = 3^{ n - 1} + 2$