Ch. 3 Vocabulary 10.) Union 11.) Intersection 12.) Disjoint sets.

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Presentation transcript:

Ch. 3 Vocabulary 10.) Union 11.) Intersection 12.) Disjoint sets

3-8 Unions and Intersections of Sets Algebra 1

UNION or U The Union of 2 or more sets is the set that contains all elements of the sets. A B Venn Diagram A U B 12

Intersection ∩ The Intersection of 2 or more sets is the set of elements that are common to every set. A B Venn Diagram A ∩ B

Disjoint Sets Disjoint sets have no elements in common. The intersection of disjoint sets is the empty set. { } or Ø A B

Union and Intersection of Sets Ex. 1) P = { x| x is a whole number less than 5} Q = { y| y is an even natural number less than 5} a)Write sets P and Q below in roster form. b)What is P ∪𝑄? c.) What is P ∩𝑄? c.) Draw a Venn Diagram representing P and Q.

Union & Intersection of Sets Ex. 2) Let A = {2, 4, 6, 8} B = {0,2, 5,7 8} C = { n| n is an odd whole number less than 10}. 2a.) What is A ∩𝐵? 2b.) What is A ∩𝐶? 2c.) What is C ∩𝐵? 2d.) What is A ∪𝐵? 2e.) Draw a Venn diagram for A, B and C.

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