2012-11-12, 09:06 PM
VerrKol Wrote:just plug the numbers in
This works well.
I am pretty sure that it's :
if D > 0 and fxx(a,b) > 0; f(a,b) is a local minimum
if D > 0 and fxx(a,b) < 0; f(a,b) is a local maximum
if D < 0 then saddle point
if D = 0 then test fails
I looked up my notes and that's what I have written, and Wikipedia also says this.

