Question

Find the 8th term in this geometric sequence.
8, 4, 2, 1, ...

Answer 1

Well, it looks like the numbers are 'halfing', right? So you know that the 5th term will be 1/2, then 1/4 and 1/8, and 1/16

Answer 2

Thus, 1/16 would be your 8th term.

Answer 3

Thank you !

Answer 4

\[a _{n}=a _{1}r ^{n-1}\]
If you get another problem like that, here's the equation to find the nth term in a geometric sequence.
\[n =term you want to find\]
\[a _{1} =first term \]
\[r= ratio\]