# Homework Help: Error function

1. Aug 7, 2009

### ws0619

1. The problem statement, all variables and given/known data
Consider the initial value problem y'+e^(x)y=f(x), y(0)=1.Express the solution of the initial-value problem for x>0 as a non elementary integral when f(x)=1 and also in term of erf(x)

Thanks!

2. Aug 7, 2009

### rock.freak667

$$\frac{dy}{dx}+P(x)y=Q(x)$$

In this form use an integrating factor

$$e^{\int P(x)dx}$$

3. Aug 8, 2009

### ws0619

I am using integrating factor try to solve this question,but how can I form error function?