Posted by Subhotosh Khan on August 08, 2002 at 07:54:02:
In Reply to: DE proof posted by Colin on August 08, 2002 at 02:37:20:
: The question starts by asking us to "prove that the equation: dy/dx = (y-4x)/(x-y) is not separable..."
: How does one provide such a proof, which is definitive (conclusive)? I'm not sure how to phrase and approach such a proof. Any tips? Thank you,
: Colin
********************************************
You will find there is a necessary condition for "separable-variable" first order differential equations.
Read it and thou shall learn....