# Lagrange differential eq.

## Homework Statement

A Lagrange differential eq. represented as follows:

y = xf(y') + g(y')

Let y' = P
and after some fancy footwork;

dx/dP - xf'(P)/(P - f(P)) = g'(P)/(P - f(P)

## Homework Equations

Now, the link that I got this from states that this is a 1st ode in standard form.
When I attempt to solve such I end up w/the following integrand:

$$\int f'(P)dP/(P-f(P))$$

I have 2 questions. How do I proceed, and when I do, is this going to involve the natural log of a Fourier transform?