Can anyone please tell me how to find the range of this function: F(x,y)= sqrt(x² + y² -1) + Ln(4-x²-y²)?

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    $\begingroup$ You have been around for more than a year. Haven't you yet noticed that you are supposed to use MathJax around here? $\endgroup$ – José Carlos Santos May 4 at 9:38
  • $\begingroup$ Sorry I got busy due to exams and I didn't have time to learn how to use it 😅 $\endgroup$ – Jonathan Gamal May 4 at 9:56