- Set is a defined as a collection of objects.
- Set of Natural numbers, N = {1, 2, 3,3 4, …..}
- Representation of Sets
- Roster form or Tabular form. E.g. A = {a, e, i, o, u}
- Set builder form. E.g. A = {x: x = vowel in English alphabet}
Guided Practice:
- Fill up the blanks.
Types of Sets
- Empty set or null set or void set. E.g. { } or phi
- Finite set. E.g. {x : x <10, x belongs to N}
- Infinite set. E.g. {x: x belongs to N}
- Singleton set. E.g. {5}.
- Equal sets. E.g. A = {2, 4, 8, 6}, B = {x:x = even number, x<10}
- Equivalent sets. E.g. A = {2, 5, 5}, B = {a, c, d}; n(A) = n(B) = 3.