A set is a collection of objecks.We talk about a set of books, a set of fruits.The words collection and family are synonyms fır the word set. Objects which belong to a set are colled members or elements. The elements are usually separated by cammas and written down between braces Sets are represented by capital letters For example we can name the june,july,augustas A and write
A = june,july,august In stead of writing " june is a member of A" We writ june A The symbol means " is a member of" or" is an element of" The symbol means " is not an element of" The expression April A İs read as "April is not an element of set A".
Examples 1.Meaningful Sets a.The set of pupils in my class This sentences gives yav a perfect description of the elements of the elments of a set, and you can make a list of its elements 2.Meaningless Sets a.The set of some people Can you list the elements of this set?