# Geometric series

Gold Member

## Homework Statement

You must enter 3 numbers between 31 and 496 so there will be an increasing geometric series with 5 components.

## The Attempt at a Solution

It tells me I'm off. That q=2. But how?

http://img716.imageshack.us/img716/8895/300xk.jpg [Broken]

Last edited by a moderator:

## Answers and Replies

I like Serena
Homework Helper
Hey FP :)

vela
Staff Emeritus
Homework Helper
With a geometric series, you multiply by q to get successive terms:

\begin{align*} a_2 & = a_1 q \\ a_3 & = a_1 q^2 \\ a_4 & = a_1 q^3 \\ a_5 & = a_1 q^4 \end{align*}

Do you see your mistake now?

Gold Member
Hey FP :)