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WGU C959: Discrete Math I (Unit 2) With Questions And 100% CORRECT ANSWERS
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WGU C959: Discrete Math I (Unit 2) With Questions And 100% CORRECT ANSWERS
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JACKLINEWGU C959: Discrete Math I (Unit 2) With Questions And
100% CORRECT ANSWES
the number of elements in aGsoet tit
Cardinality of a set
Symbol N All natural numbers >= 0
Symbol Z All integers
Symbol Q All rational numbers
Symbol R All real numbers
Denoted by U
Universal set
a set that contains all elements mentioned in a particular context
If A ⊆ B and there is an element of B that is not an element of A (i.e., A ≠ B), then A is a
Proper subset
proper subset of B, denoted as A ⊂ B
Set of all subsets
Power set
For example, if A = { 1, 2, 3 }, then:
P(A) = { ∅, { 1 }, { 2 }, { 3 }, { 1, 2 }, { 1, 3 }, { 2, 3 }, { 1, 2, 3 } }
Cardinality of a power set 2^n (n = cardinality of set)
A⊕ B=(A- B)𝖴 (B-A)
Symmetric difference
(either or)
The set of all elements in the universal set that are
not in a given set.
Complement of a set
Let A1, A2, ..., An be any finite sets. Give a An element x is in A1 ⊕ A2 ⊕ ... ⊕ An if the number of sets that contain x is an odd
concise description for which elements number.
from A1, A2, ..., An are in A1 ⊕ A2 ⊕ ... ⊕
An.
an equation involving sets that is true regardless of the contents of the sets in the
expression.
Set identity
(uses the same laws of propositional logic)
1/2
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