# Homework Help: String question

1. Sep 2, 2008

### Physicsissuef

1. The problem statement, all variables and given/known data

Determine the formula of this string:

2,4,8, ...

2. Relevant equations

3. The attempt at a solution

How will I determine the formula of this string? Is there any general formula, or I am let on my own to determine what it is?

Thank you.

2. Sep 2, 2008

### symbolipoint

Why do you call, "2, 4, 8, ..." a string? Could you call it a sequence?

Using "2" as the first term, how is the next term determined? How is the term after that one determined? The fourth term is not shown, but the pattern continues.

3. Sep 2, 2008

### Physicsissuef

$$a_n=2^n$$

But there is another one.