Set Union and Intersection

Front

What is a set?

Back

A set is a collection of distinct objects, considered as an object in its own right. For example, Set A = {1, 2, 3}.

Front

What does the union of two sets represent?

Back

The union of two sets, denoted as A ∪ B, is the set of elements that are in A, in B, or in both.

Tags

CCSS.HSS.CP.A.1

Front

What does the intersection of two sets represent?

Back

The intersection of two sets, denoted as A ∩ B, is the set of elements that are common to both A and B.

Front

How do you denote the empty set?

Back

The empty set is denoted by {} or ∅ and contains no elements.

Front

If Set A = {1, 2} and Set B = {2, 3}, what is A ∪ B?

Back

A ∪ B = {1, 2, 3}.

Front

If Set A = {a, b, c} and Set B = {b, c, d}, what is A ∩ B?

Back

A ∩ B = {b, c}.

Front

What is the difference between a subset and a proper subset?

Back

A subset is a set where all elements are contained in another set. A proper subset has at least one element less than the other set.

Front

If Set A = {x | x is an even number} and Set B = {x | x is a prime number}, what is A ∩ B?

Back

A ∩ B = {2}, since 2 is the only even prime number.

Front

What is the union of the sets {1, 2} and {2, 3, 4}?

Back

The union is {1, 2, 3, 4}.

Front

If Set A = {red, blue} and Set B = {blue, green}, what is A ∩ B?

Back

A ∩ B = {blue}.