types of sets

Question 1

what are equal sets?

Answer 1

2 sets that consists of the exactly same elements

Question 2

what are finite sets?

Answer 2

a set that you are able to list all the elements in it (i.e. countable)

Question 3

what are empty/null sets?

Answer 3

sets without any elements

Question 4

what are disjoint sets?

Answer 4

2 sets with no common elements

Question 5

what is a subset? difference between 2 symbols?

Answer 5

the one with line:
- general subsets (A has everything B has)
- A can be equal to B

the one without line:
- specific subsets
- A has everything B has and also has things B doesn’t have

Question 6

what is a universal set?

Answer 6

contains all the elements in a particular set

Question 7

what is a complement of a set?

Answer 7

contains all the elements in a universal set except the main set

Question 8

what are intersection of sets?

Answer 8

set of common element found in both A and B only

Question 9

what are unions of sets?

Answer 9

set of element which belongs to either:
- set A
- set B
- both