IB Math Core Topics Chapter 2- Sets and Venn Diagrams

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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, ...}


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