Bonjour;
(2019! + 2017!)/(2019! - 2017!) = (2019!/2017! + 1)/(2019!/2017! - 1)
= (2019 x 2018 + 1)/(2019 x 2018 - 1) = (2019 x 2018 - 1 + 2)/(2019 x 2018 - 1)
= 1 + 2/(2019 x 2018 - 1) .
Conclusion : Le reste de la division de (2019! + 2017!) par (2019! - 2017!) est : 2 .