# A geometric sequence is defined recursively by an = 4an-1. The 10th term of the sequence is a10 = 3.5. What is a13?

##### 1 Answer

Jul 9, 2015

#### Answer:

Using (I think) a different interpretation of the question than Spandy's answer (which I'm not certain I understand):

#### Explanation:

Assuming the "givens" are: