View Single Post
P: 735
 Quote by Bipolarity Also, why are we allowed to integrate both sides of the equation with respect to different variables?
You're not really integrating the y side in terms of y, because y and dy are functions of x. You're using substitution. For example, if $$y=C e^{k x}$$, then $$\frac{dy}{y}=\frac{C k e^{k x} dx}{C e^{k x}}=k dx$$.

As for the rest. I'm as lost as you are. I had a thread on this a long time ago. I'm looking for it now.