Maximum and Minimum of function of two variables

http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/MaxMin2varMD.html
[url=http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/MaxMin2varMD.html]http://dmentrard.free.fr/GEOGEBRA/Maths/Export5/MaxMin2varMD.html[/url]
– Daniel Mentrard

Information: Maximum and Minimum of function of two variables