# Diffusion equation with variable dissipation

1. Dec 16, 2009

### oddiseas

1. The problem statement, all variables and given/known data

Solve the equation
U{t}=kU{xx}+cU

Hint:use an integrating factor

2. Relevant equations

3. The attempt at a solution

2. Dec 17, 2009

### HallsofIvy

Staff Emeritus
What have you done? The hint says "use the integrating factor". What is the integrating factor?