3.5 ­ Working with Sets.notebook
3.5: Working With Sets
October 28, 2015
Date: 10/28
Roster Form:
Set­Builder Notation:
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3.5 ­ Working with Sets.notebook
October 28, 2015
Ex 1). How do you write “M is the set of whole numbers that are less
than 5” in roster form? In set­builder notation?
Ex 2). N is the set of even natural numbers that are less than or equal
to 12. How do you write N in roster form? In set­builder notation?
Ex 3). In set­builder notation, how do you write the solutions of
­4x + 3 <15?
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3.5 ­ Working with Sets.notebook
October 28, 2015
o You know that a set A is a subset of a set B if each element of A is
also an element of B.
o ex:
o The empty set, or null set, is the set that contains no elements. The
empty set is a subset of _________ set. Use ________ or _________ to
represent the empty set.
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3.5 ­ Working with Sets.notebook
October 28, 2015
Ex 4). What are all of the subsets of the set {1, 2, 3}?
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3.5 ­ Working with Sets.notebook
October 28, 2015
o When working with sets, you call the largest set you are using the
universal set.
o The complement of the set is the set of all elements in the universal
set that are not in the set. You denote the complement of A by ______.
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3.5 ­ Working with Sets.notebook
October 28, 2015
Ex 5). Given that the universal set U = {car, truck, van, school bus,
bicycle} and that set A is the set of vehicles that have 4 wheels, what is
the complement of set A?
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3.5 ­ Working with Sets.notebook
October 28, 2015
Ex 6). Universal set U = {months of the year} and set A = {months with
exactly 31 days}. What is the complement of set A?
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3.5 ­ Working with Sets.notebook
October 28, 2015
Homework:
pg. 197 #1 ­ 8, 10 ­ 46(e)
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