Find the 8th term in the sequence
-1/2,-1, -2, -4,...
Hint: Write a formula to help you.
1st term . Common Ratio desired term – 1)

-64

Step-by-step explanation:

By looking at the numbers, we can identify that this is a geometric sequence and the ratio would be 2. The formula to find the nth term in a geometric series is:

where t is the first term and r is the ratio. We can substitute in the information we know:

We are looking for the eighth term, so we substitute 8 where n is:

We can simplify:

just sum

10 + 10 = 20