Intermediate Algebra: Understanding Sets

What is the roster method used for in set theory?

• To calculate the sum of elements in a set

• To find the intersection of two sets

• To determine the difference between two sets

• To list all elements of a set using curly braces

Which symbol is used to denote the union of two sets?

• A regular U

• A minus sign

• A plus sign

• An upside-down U

What does the intersection of two sets represent?

• All elements in either set

• Elements common to both sets

• The difference between the sets

• The sum of all elements in both sets

In the example given, which elements are in the union of sets A and B?

• 2, 3, 4, 5

• 1, 3, 5, 7

• 2, 4

• 1, 2, 3, 4, 6, 8

Which elements are in the intersection of sets A and B in the example?

• 1, 2, 3, 4

• 6, 8

• 2, 4

• 1, 3