Sets and Numbers Flashcards
1
Q
x ∈ B
A
x is an object contained in B
2
Q
x ∉ B
A
x is not contained in B
3
Q
B ⊆ C
A
“B is a subset of C”
4
Q
B ⊄ C
A
“B is not a subset of C”
5
Q
N = {1,2,3,4,…}
A
Natural Numbers
6
Q
Z = {…, -2, -1, 0, 1, 2, …,}
A
Integers
7
Q
Q = n/m
m ≠ 0
A
Rational Numbers
