Partial Derivatives of f(x,y)

http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/PartderiveMD.html
Some elements do not appear in the html version
[url=http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/PartderiveMD.html]http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/PartderiveMD.html[/url]
– Daniel Mentrard

Information: Partial Derivatives of f(x,y)