I have tried the following and get an error I don't understand. I am a bit of a newbie so I expect there is a simple explanation.
DSolve[{f'[t] == k f[t] - c, f[0] == D, f[T] == 0}, f[t], t]
I get DSolve::bvnul: For some branches of the general solution, the given boundary conditions lead to an empty solution.
I don't understand this! please help!
Many thanks,
Steve