Chapter 3 Vocabulary 3.)Roster form 4.) Set-builder notation 5.) Empty set 6.) Universal set 7.) Complement of a set

3-5 Working with sets Algebra 1

Roster form {3,6,9,12,…} Set Builder notation – describes the properties an element must have to be included in a set. {x| x is a multiple of 3} which reads “the set of all real numbers x, such that x is a multiple of 3”

Ex. 1 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 set builder notation?

Ex. 2) In set builder notation, how do you write the solutions of

Empty set or Null set – a set that contains no elements Empty set or Null set – a set that contains no elements. Ø or { } to represent empty set. The empty set is a subset of every set.

Ex. 3) List all the subsets of each set. { 1 , 2 , 3 }

Universal set (U) – is the largest set Complement of a set is the set of all elements in the universal set that are NOT in the set. A’ Ex. 4 ) Suppose U = { 1,2,3,4,5} is the universal set and A = {2,3} . What is A’?