MHB How to Make $y(x^3e^{xy}-y) \, dx+x(xy+x^3e^{xy}) \, dy=0$ Exact?

danny12345
Messages
22
Reaction score
0
$y(x^3e^{xy}-y) \, dx+x(xy+x^3e^{xy}) \, dy=0$
change it into exact differential and help me in solving it
 
Physics news on Phys.org
I've improved your typesetting by including dollar signs, as well as introducing a right parenthesis that seemed implied.

So, we need to convert this into an exact equation. I would recommend multiplying by something of the form $x^n y^m$, and see if you can figure out the $n$ and $m$ that make it exact.
 
Thread 'Direction Fields and Isoclines'
I sketched the isoclines for $$ m=-1,0,1,2 $$. Since both $$ \frac{dy}{dx} $$ and $$ D_{y} \frac{dy}{dx} $$ are continuous on the square region R defined by $$ -4\leq x \leq 4, -4 \leq y \leq 4 $$ the existence and uniqueness theorem guarantees that if we pick a point in the interior that lies on an isocline there will be a unique differentiable function (solution) passing through that point. I understand that a solution exists but I unsure how to actually sketch it. For example, consider a...
Back
Top