SET

• SET
• set is a well defined collection or grouping of objects
• elements or members
• object in a set are called elements or members of the set
• set are usually denoted by capital letters of the English alpha..(A,B,X,Z)
• members usually denoted by simple letters(a,b,x,z)
• Example
• if capital A is a set of odd integer below 10 than we can show this set as          A={1,3,5,7,9}
• 3 is a element of A=    3 belongs to A          =3∈A
• 8 is not element of A= 3 not belongs to A    =8∉A
• no.of elements of the set
• A={1,2,3,4,5,7}
• no elements is a set A its denoted by n[A] 
• n[A]=6
• Set builder form
• consider set"R" which is shown as R={x|x is a vowel letters below English alphabets}
• X={a,e,i,o,u}