Find each union or intersection. Let A = { 1 , 3 , 5 , 7 , 9 } , B = { x ∣ x is a positive. odd integer less than 10 } , C = { 1 , 2 , 4 , 7 } , and D = { x ∣ x is a negative integer between − 5 and − 1 } . A ∪ C
Find each union or intersection. Let A = { 1 , 3 , 5 , 7 , 9 } , B = { x ∣ x is a positive. odd integer less than 10 } , C = { 1 , 2 , 4 , 7 } , and D = { x ∣ x is a negative integer between − 5 and − 1 } . A ∪ C
Find each union or intersection. Let
A
=
{
1
,
3
,
5
,
7
,
9
}
,
B
=
{
x
∣
x
is a positive. odd integer less than
10
}
,
C
=
{
1
,
2
,
4
,
7
}
,
and
D
=
{
x
∣
x
is a negative integer between
−
5
and
−
1
}
.
For any two or more sets, union of the sets gives the elements which are in the either one of the sets and the all elements of all sets. Common elements are considered once. Union is represented by the symbol ∪ .
For any two or more sets, intersection of the sets gives the elements which are the only common elements of the sets. Intersection is represented by the symbol ∩ .
Calculation:
Consider the given sets.
A={1,3,5,7,9}
and
Now, the set C can be written as
C={1,2,4,7}
Now, A∪C contains elements of A and C . Common elements will be considered once.
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