Ok! Thank you very much.

Ok! Thank you very much.

Georgios Kokovidis, The answer is not important, I just made an example because I wanted to know how to find the critical points. I have to evaluate more functions, so I would like to know how to do it. Thanks for helping me, Patrick

Georgios Kokovidis, The answer is not important, I just made an example because I wanted to know how to find the critical points. I have to evaluate more functions, so I would like to know how to do it. Thanks for helping me, Patrick