home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
501 Great Games
/
501 Great Games - Volume One (2001)(Guildhall Leisure Services).iso
/
EASIQS_5
/
SAMPLE04.SDY
< prev
next >
Wrap
Text File
|
1996-03-09
|
4KB
|
165 lines
"EASI QS v5"
"Discrete Mathematics Chpt 1 (Sets)"
"MS Sans Serif"
"MS Sans Serif"
9.75
"
The objects of a set are called...?"
9.75
"
elements, points or members "
9.75
"
Describe the following sets: N, Z, Q, R "
8.25
"
N = Set of all positive integers
Z = Set of all integers
Q = Set of all rational numbers
R = Set of all real numbers "
9.75
"
Two notations for defining a set are..."
9.75
"
List notation
Set-builder notation "
9.75
"
Describe the difference between 'membership' and 'inclusion'. "
9.75
"
'membership' refers to the elements or objects that make up a set.
'inclusion' refers to one SET being a subset of another."
9.75
"
Define 'inclusion': "
9.75
"
A is included in B, if and only if
every member of A is a member of B."
9.75
"
Define 'equality' between sets"
9.75
"
A equals B, if and only if
A is a subset of B, and B is a subset of A.
or put another way...
if and only if every member of A is a member of B, and vice versa. "
9.75
"
Comment on 'order' and 'repetition' within sets "
9.75
"The 'order' in which items appear in a list does not influence the
set made from that list.
The 'repetition' of items in a list does not influence the set
made from that list. "
9.75
"
Define the empty set. "
9.75
"
The empty set is a SUBSET of every set,
but not a member of a set unless specifically listed. "
9.75
"
Is the empty set an element of the empty set? "
9.75
"
No. "
9.75
"Define a proper subset."
9.75
" A is a proper subset of B, if A is a subset of B but not equal to B
that is, B is not a subset of A."
9.75
"
Define a universal set. "
9.75
"
A set including all the sets under discussion
usually it is a standard set, such as, N, Z, or R. "
9.75
"
Define a union. "
9.75
"
The union of A and B is defined to be
the set of all points x, such that x is in A or B or both. "
9.75
"
Define the intersection of two sets. "
9.75
"The set of all points y such that y is in A and y is in B.
Thus, A intersection B is a subset of A and a subset of B
- if A and B have no elements in common, we call them DISJOINT
- if A and B have elements in common, we say they MEET. "
9.75
"
Give an example of the commutative law for union and intersection. "
9.75
"A union B = B union A
A intersection B = B intersection A "
9.75
"
Give examples of the associative law for union and intersection."
9.75
"(A union B) union C = A union (B union C)
(A intersection B) intersetion C = A intersection (B intersection C) "
9.75
"
Give examples of the distributive law for
- union distributes over intersection
- intersection distributes over union."
9.75
"A union (B intersection C) = (A union B) intersection (A union C)
A intersection (B union C)=(A intersection B) union (A intersection C)"
9.75
"
What is the first rule for proofs? "
9.75
"
Go to the definitions & identify the targets "
9.75
"
Define the RELATIVE COMPLEMENT of B in A (denoted A - B or A \ B ) "
9.75
"The set of all elements of A that are not elements of B
Also known as SET-THEORETIC DIFFERENCE"
9.75
"Define the CARTESIAN PRODUCT of A and B "
9.75
"The set of all ordered pairs (a,b) where a is in A, and b is in B
denoted as A x B
Note: the order matters... (2,3) IS NOT THE SAME AS (3,2)
so A x B is not the same set as B x A UNLESS A=B
or unless A or B is empty ( A x 0 = 0 ) where 0 = the empty set"
9.75
"
What is the strategy for proofs ? "
9.75
"
The last assertion or operation used to form the statement
is the DEFINITION we go to first."