Give some examples of sets
{1,2,3}
{a,e,i,o,u}
{2,4,…..,22}
Review notations used in SETS (on Notability/GC)
Good luck!!!
What are 2 common sets?
N set
Z set
What is the N set called + what is it made up of?
-> N : ‘natural numbers’
-> made up of all positive integers
What is the Z set called + what is it made up of?
-> Z : ‘integers’
-> made up of all integers (positive + negative)
What does n(A) mean?
-> n(A) means the no. of elements in A
-> e.g. n({1,2,3}) = 3
Review subsets, their notation + how they work (on Notability/GC)
Good luck!!!
TRUE or FALSE: there is such thing as an EMPTY set
TRUE
What is the symbol for an empty set + what is an empty set?
-> symbol: circle w/ a forward slash through it
-> the ‘empty set’ is a set with NO elements
TRUE or FALSE: there is such thing as a UNIVERSAL set
TRUE
What is the symbol for the universal set + what is it?
-> symbol: curly/squiggly E
-: the universal set is the set with ’all’relevant elements
What does A ∪ B mean?
-> A ∪ B = A union B
-> A ∪ B = all elements in A or B
What does A ∩ B mean?
-> A ∩ B = A intersect B
-> A ∩ B = all elements in A and B
What is a complement in sets?
A complement of a set is all elements in the universal set but not in the set
What is complement of Set A’?
The complement of Set A’ is all elements in the universal set but not in A
How is a complement shown?
A’ (apostrophe denotes complement of A)
Do practice questions on sets (on Notability/GC/DrFrost)
Good luck!!!
