tennis squash badminton among the units of a match, in tennis 1 by which just one player or set of players have to get at the least six gamesA perform from the set A—the area—into a established B—the codomain—is actually a rule that assigns to every aspect of the a unique factor of B.D?ch trong m?i ?ng d?ng B?t k? b?n ?ang dùng ?ng d?ng n�