What is a set?
a collection of things, like toys or numbers, grouped together.
What is a subset?
a smaller collection that contains only items from a larger set
what is an empty subset?
a subset that contains no elements. It is denoted by { } or ∅, and is a subset of every set, including itself.
what are real numbers (R)?
All numbers that can be found on the number line, including both rational and
irrational numbers
What are rational numbers (Q)?
Numbers that can be expressed as a fraction of two intergers. Ex. 1/2, -3, 0.75
What are irrational numbers (Q’)
Numbers that cannot be expressed as a fraction. Ex. π, √2
What are integers? (Z)
Whole numbers and their negatives. Ex. -3, 0, 4
What are whole numbers (W)?
natural numbers plus 0 Ex. 0, 54
What are natural numbers?
counting whole positive numbers not including 0
What is a finite set?
A set with a countable number of elements
What is an infinite set?
a set with no end.
what are curly bracets for { }
to list elements
what is the symbol of “is not an element of”
e with a line down the middle
what are … for in math
indicates continuation (in infinite sets)
what is the symbol ϵ for in math
“is an element of”
what is the symbol I in math
“such that”
