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.
-Find $a _ { 4 }$ when $a _ { 1 } = 6 , r = 4$ .

A) 384
B) 1536
C) 64
D) 72