1. The problem statement, all variables and given/known data Hi guys , I have this problem ,well actually I don't understand the solution they provide , Here's the problem statement and the solution . May someone please explain the solution to me?? Thanks so much, Sorry for my bad english 2. Relevant equations 1.I understand that f'-af=0 and the kernel is the space of the solutions that satisfy that equation but I don't get what they do after that...why do they divide f(t) by e^(at)? 2. why do they conclude that exists a constant c such that f(t)=ce^at??