Answer:
2
Step-by-step explanation:
According to the definition of geometric progression.
an= a1 · q n-1
an means the n-th term, q means the common ration.
from the meaning of the question
a10 = a1 · q n-1 {make n=10}
1024= a1 · 2 10-1
1024 a1 · 2 9 {subtraction}
1024= a1 · 512 {2 9 = 512 · 210= 1024}
a1= 1024/512=2 {division}
hence the answer is 2
i hope it helps:)
