Answer:
C, 0.125
Explanation:
pretty sure that the answer's C.
if a1=8, you can plug that in for an in the expression and get the second term. this would then show that the common ratio of this geometric sequence is 0.5, so:
a2=4
a3=2
a4=1
a5=0.5
a6=0.25
a7=0.125
a8=0.0625
and so on. hope this helped, good luck!