Hey math'ers...

I'm trying to figure this out, it should be simple, but...

El x f(x) = x/f(x) * f ' (x), so...

El x f(x)/g(x) = x (f/g) * d/dx (f / g), which means...

El x f/g = x (f/g) * (f * g ' - f ' * g), so I know the result is supposed to be... El x (f/g) = El x f - El x g, but - how do I get on?

Any help is appreciated...

Simon DK