Find the Nth Term of the Geometric Sequence $$a = 2 ; r = - 4$$

Multiple Choice

Find the nth term of the geometric sequence.
- $$a = 2 ; r = - 4$$

A) $a _ { n } = 2 \cdot 4 ^ { n - 1 }$
B) $a _ { n } = - 4 \cdot 2 ^ { n - 1 }$
C) $a _ { n } = 2 \cdot - 4 ^ { n }$
D) $a _ { n } = 2 \cdot - 4 ^ { n - 1 }$