# Estimating Sums of Alternating Series help

1. Apr 11, 2010

### Slimsta

1. The problem statement, all variables and given/known data
[PLAIN]http://img696.imageshack.us/img696/3438/46981606.jpg [Broken]

2. Relevant equations

3. The attempt at a solution
in those squars, im sure about everything that i did and i get it wrong..
the only thing i dont know is bn+1 how would i know if its =, < or > than 0.008 ?

once i know that, everything else just follow it..

Last edited by a moderator: May 4, 2017
2. Apr 11, 2010

### Slimsta

someone please?

3. Apr 12, 2010

### lanedance

i haven't checked your working, but doesn't it ask for n as "an integer"?

4. Apr 12, 2010

### rs1n

First, note that n is supposed to be NATURAL NUMBER. So can n have trailing digits after the decimal place? As for whether you should have =, <, or >... reread both the problem statement (the error should be less than .008) as well as the Alternating Series Estimation Theorem (consider the relationship between $b_{n+1}$ and the error).

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