Originally Posted by

**blaisem** Thanks for the help to both of you!

One question: HallsofIvy mentions that the equation is separable into [tex]\frac{d[I]}{I}=-k_{b}dt[\tex]

but I thought it wasn't separable because of the exponential term on the right-hand side of the original equation? Can you just ignore that term, since it doesn't seem to appear in HallsofIvy's homogeneous equation?

I also wasn't sure if it was linear because (at least in Wikipedia) a linear equation has all unknown functions and their derivatives to the first power, but I had a function f(t) that was an exponential function.