Chapter 2 - Sets, Functions, Sequences, Sums, Matrices Flashcards
1
Q
Two sets are equal …
A
if and only if they have the same elements
2
Q
set
A
unordered collection of objects, “contains” its elements
3
Q
elements or members
A
objects in a set
4
Q
roster method
A
S = {a, b, c, d ….}
5
Q
set builder notation
A
SetName = {variable | condition}
6
Q
Sets: N
A
Natural numbers: N = {0, 1, 2, 3, …}
7
Q
Sets: Z
A
Integers: Z = {…, -2, -1, 0, 1, 2, ….}
8
Q
Sets: Z+
A
Positive Integers: Z+ = {1, 2, 3, …}
9
Q
Sets: Q
A
Rational Numbers: Q = {p/q | p ∈ Z, q ∈ Z, q ≠ 0}
10
Q
Sets: R
A
Real Numbers
11
Q
Sets: R+
A
Positive Real Numbers
12
Q
Sets: C
A
Complex Numbers
13
Q
∈, ∉
A
is an element of, is not an element of
14
Q
A is a subset of B, A ⊆ B …
A
if and only if every element of A is also an element of B
A ⊆ B
15
Q
Empty or Null Set
A
A set that contains no elements
Ø or { }
