Classification of Pde Hyperbolic Parabolic

preview_player
Показать описание
Even a small amount will be appreciable.
Рекомендации по теме
Комментарии
Автор

If f(x, y)=x*y=constant where f function x, y but constant, what is df/dx? (df/dx is partial derivative). Is df/dx=0 or df/dx=y?

aremijfaye