Use the Formula for the General Term of a Geometric $$\mathbf { a } _ { 1 }$$

Multiple Choice

Use the Formula for the General Term of a Geometric SequenceUse the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the
sequence with the given first term, $$\mathbf { a } _ { 1 }$$ , and common ratio, r.
- $$4 , - \frac { 4 } { 5 } , \frac { 4 } { 25 } , - \frac { 4 } { 125 } , \frac { 4 } { 625 } , \ldots$$

A) $a _ { n } = 4 \left( - \frac { 1 } { 5 } \right) n - 1$
B) $a _ { n } = 4 \left( - \frac { 1 } { 5 } \right) ^ { n }$
C) $a _ { n } = 4 \left( - \frac { 1 } { 5 } \right) ^ { n + 1 }$
D) $a _ { n } = 4 \left( - \frac { 1 } { 25 } \right) ^{ n - 1}$