Sabtu, 2 Julai 2016
SETS
A collection of "things" (objects
or numbers, etc). Each member is called an element of the set.
Example :
A group of people
{Tall,Fat,Short,Thin,Muscular}
Sets also can be grouped into a Venn diagram.
ԑ = {x : x is a positive integer <14}
A = {x : x divisible by 3}
B = {x
: x divisible by 4}
Draw a Venn diagram to illustrate the
information above.
ԑ = {1,2,3,4,5,6,7,8,9,10,11,12,13}
A = {3,6,9,12}
B =
{4,8,12}
Set Notation :
∈
is an element of
∉
is not an element of
n(A) the number of
elements in set A
n(A’) compliment of set
A
∅
the empty set
ԑ universal set
⊆
is a subset of
⊂
is a proper subset of
∪
union
∩ intersection
Example 2 :
On the venn diagram
below,shade the region representing the sets given.
(a) (A∪B)’
Ans/Solution :
