Solving Differential Equations with Mathematica's Solver
Consider the differential equation:
2x ex2 dx = sin2y cosy dy
This equation is a very typical separable differential equation. It can be
solved by directly integrating both sides, (since it has already been separated.)
At least that's what you'd do if you were going to solve it by hand. We're
going to figure out how to get Mathematica to do it.
Before we get out the "big guns" let's realize that we can already solve this
kind of differential equation with more basic commands than
DSolve. What we can do instead is simply mimic with
Mathematica the way we would solve this problem if we were doing it on
paper! As we mentioned above, this would mean integrating both sides separately,
and setting the results equal to each other (up to the obligatory constant, of
course.)
Mathematica's Integrate command will do the job for us
So let's ask Mathematica for the syntax of Integrate by
issuing the command ?Integrate. Go ahead and switch to
Mathematica now and try this command. Don't forget to switch back here when you are done.
Let's now move on to discuss the syntax you just discovered.
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