Un ENORME classique X-PC 2025 sur les DETERMINANTS (sup/L1)

Here's a sample oral exam question from X-PC 2025 on DETERMINANTS, a classic topic in competitive exams. What about a matrix A such that for any matrix M, we have: det(A+M)=det(A)+det(M) This will be an opportunity to work on both determinants and matrices! CUPGE Avignon Presentation ►    • Découvrez la licence de Mathématiques, par...   CUPGE Avignon Preparatory Course ► https://formations.univ-avignon.fr/fo... Avignon University ► https://univ-avignon.fr/ Instagram ►   / cassoumathprepa   00:00 Introduction 00:31 Problem Statement 01:09 First Hint 01:21 Solution: make det(A)=0 02:30 Second Hint 03:03 Third Hint! 03:34 Solution: make rg(A)=0 07:12 Solution: End of the story 09:25 CHALLENGE! 10:07 Epilogue The content of this video is solely the responsibility of its author and does not represent the views of Avignon University.