Recent content by OllyRutts

Thanks much appreciated.

I should have said this relates to a LIH dielectric material pf is the free charge density I guess the textbook I am using is using for gauss's law in terms of D=\varepsilon\varepsilon_0E So any is appropriate for the general form?

I am having trouble determining what the general form of Poisson's equation would be between and Can they both be called the general form?

Homework Statement (d^2y/dx^2) + (dy/dx) = cos xSo you have the trial solution y= p*cos(x)+q*sin(x) (dy/dx) = -p*sin(x)+q*cos(x) (d^2y/dx^2)=-p*cos(x)-q*sin(x) The issue I am having is equating the coefficients when after I have subbed them into the initial equation...