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Finite Math

Venn Diagrams and Partitions

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- 1. 1.2Venn Diagrams and Partitions
- 2. Venn Diagram Graphic representation of sets: Big rectangle is Universal Set, Set A and B in circles
- 3. Union and Intersectionon Venn Diagram Represented by shaded area: A U B: A ∩ B:
- 4. Complements A’: B’:
- 5. Complement with Unionand Intersections (A U B)’ [everything not in A U B]: A’ ∩ B’ [common area from A’ and B’]: A’ B’ A’ ∩ B’ Notice, they are the same thing
- 6. Quiz 1.2.1 Which of the following represent this Venn Diagram? A. A U B B. A’ ∩ B C. A ∩ B’
- 7. Quiz 1.2.1 Which of the following represent this Venn Diagram? A. A U B B. A’ ∩ B C. A ∩ B’
- 8. Quiz 1.2.1 Which of the following represent this Venn Diagram? A. A U B B. A’ ∩ B C. A ∩ B’ Answer: C Note: Another way to read C is “A without B”
- 9. Disjoint Sets Sets A and B are disjoint if there are no common elements between them. Ex: A = {1, 3, 5}, B = {2, 4, 6} A B
- 10. Partitions The partition of a set X are disjoint subsets whose union is the set X. Ex: Let X = {days of the week}. Let A = {Mon, Tues}, B = {Wed, Thu, Fri}, C = {Sat, Sun} A, B, and C are said to be a partition of X.
- 11. Quiz 1.2.2 Let U = {outcome of one die roll}. Which of the following sets are a partition of U? A. X = {1, 2, 3}, Y = {4, 5, 6} B. X = {1, 3, 5}, Y = {1, 2, 3} C. X = {1, 2, 3, 4}, Y = {3, 4, 5, 6}
- 12. Quiz 1.2.2 Let U = {outcome of one die roll}. Which of the following sets are a partition of U? A. X = {1, 2, 3}, Y = {4, 5, 6} B. X = {1, 3, 5}, Y = {1, 2, 3} C. X = {1, 2, 3, 4}, Y = {3, 4, 5, 6} Answer: A
- 13. Summary How to use and interpret Venn Diagram Union/Intersection/Complement Deﬁnition: Disjoint Partition
- 14. Features 27 Recorded Lectures Over 116 practice problems with recorded solutions Discussion boards/homework help Visit ﬁnitehelp.com to ﬁnd out more For special offers and additional content...Follow us on twitter @ﬁnitehelp Become a fan on Facebook

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