Homework Statement
Find the general solution of
u_{xx} + u = 6y,
in terms of arbitrary functions.
Homework Equations
The PDE has the homogeneous solution, u(x,y)=Acos(x)+Bsin(x) .
u_{xx} + u = 6y has the particular solution, u(x,y)=6y
The Attempt at a Solution
Taking a...