\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Cours
À propos
Se connecter
S'inscrire
\(\{5, 6, 7\} \cup \emptyset =\)
\(\{5, 6, 7\}\)
\(\emptyset\)
\(\{5, 7\}\)
\(\{5, 6\}\)
Exit ➔