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.
- $3 , \frac { 3 } { 2 } , \frac { 3 } { 4 } , \frac { 3 } { 8 } , \frac { 3 } { 16 } , \ldots$

A) $a _ { n } = 3 \left( \frac { 1 } { 2 } \right) ^ { n - 1 }$
B) $a _ { n } = 3 \left( \frac { 1 } { 2 } \right) ^n$
C) $a _ { n } = 3 \left( \frac { 1 } { 2 } \right) ^{ n + 1}$
D) $a _ { n } = 3 \left( \frac { 1 } { 4 } \right) ^{ n - 1}$