Find minimum or maximum of multi-variable function

[parisse]

(08-29-2019 07:19 PM)teerasak Wrote:  @parissee, you are right. So the minimum for this case is the distance between two point, which is 41. However, I’m not sure, in HP prime, is there the command to find Min/max of multi-variable function? One tools I use is 3D graph. It helps but quite difficult to read the value, and no tools to find extremum in the graph.

There is an extrema command in Xcas to do that, but it seems it is not available in the Prime CAS.