Maths ~ Sets

Question	Answer
Sets	A set is a collection of well defined objects. The objects in the sets are called elements
# ?	#=cardinal number . Cardinal number is the umber of elements in a set !
Fact	Elements can not be repeated
How are sets opened and closed ?	Sets are opened with a curly bracket { and closed with a curly bracket }
Null set ?	Has no elements written like {}
Fact	Null set and the set itself are always a subset
Improper subset	If one set has all the same elements of another
Proper subset	If one set is a subset of another set but does not have all the same elements as the set
Union & intersection	Union is what are in all the sets Instersection is what is in both sets only
Venn diagrams ?	Are used to represent sets
Universal set?	Is the rectangle that the sets are sometimes in ! This rectangle and the area of it Is known as the universal set
Complement	Every thing outside that set
Elements ? Subset? Equal to	E with a line is not an element E is an element of C with a line is not a subset of C is a subset of = with a line is not equal to = is equal to

Resource summary

	Created by jennycazabon about 12 years ago