IB Math Core Topics Chapter 2- Sets and Venn Diagrams
R=
QUQ1
YOU
union (combine both sets with no overlap)
All decimals that terminate or reoccur (ex. 3/8, -7/8, 0.3)....
are rational
{x|a<*x<*b} *=double line
closed on number line
{x|a<*x<b} *=double line
closed to open interval
A'
complement (everything NOT in the given set) (but in the universal)
E (squished)
element (3EU, 1EU)
U (upside down)
intersection (what is exactly the same in the sets)
Q1
is a set of all irrational numbers (ex. pi, squares)
E (squished)(vertical line)
not an element of
n(A)
number in set (n(A)=4)
{x|a<x<b}
open
{x|a<x<*b} *=double line
open to closed interval
R
real numbers- real numbers can be placed on the number line
N
the set of all natural or counting numbers
Q
the set of all rational numbers or numbers that can be written in the form p/q where p and q are integers, q does not equal 0
Z
the set of intergers
Z+
the set of positive integers, {1, 2, 3, ...}