Find the Nth Term of the Geometric Sequence $a _ { n } = - 8 \cdot 2 ^ { n }$

Multiple Choice

Find the nth term of the geometric sequence.
--8, -16, -32, -64, -128 A) $a _ { n } = - 8 \cdot 2 ^ { n }$
B) $a _ { n } = a _ { 1 } + 2 ^ { n }$
C) $a _ { n } = - 8 \cdot 2 ^ { n - 1 }$
D) $a _ { n } = - 8 \cdot 2 n$