The set
represents a group of people, animals, objects, or what we are interested. We use a bracket "{}" show a set, and what's inside the bracket. We call a souvenir!Equal sets, set 2 sets are equal when the number of members and members of the 2 set too ทุกตัว, such as A = {,}, 1 2 3 B = {,, 1 2 3}. A = B
finite set is a finite set of any set when. We know the number of element of a set that is like A = {1 2 3,,,,...100} will n (A) = 100 A a finite set
infinite sets, set any infinite set, when a number of members of the set that so much that the do not like A = {,,, 1 2 3...} will A is infinite set
headlamp is set with no members, such as {} = 0
.Subset. If all members of the A is a member of the B, is called A is a subset of B wrote that set is a subset of a set A B instead. A ⊂ B
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