Question

What is the 8th term of the sequence 1, 3, 9, 27, 81,... .

Answer 1

9514 1404 393

Answer:

2187

Explanation:

This geometric sequence has a first term of 1 and a common ratio of 3. Its general term can be written as ...

an = a1·r^(n-1)

an = 3^(n-1)

Then the 8th term is ...

a8 = 3^(8-1) = 2187