Operations on Sets 1MPES2 Ecole Supérieure de Commerce de Neuchâtel Pierre Marchal Attribute to: Pierre Marchal (Jean-Piaget High School)

Objectives of the course By the end of the course, you should be able to: – Know the 3 ways of describing a set – Know the operations on sets – Perform the operations on sets

Descriptions of a Set (1) A set is a You already know :,,, and There are 3 ways of describing a set: – (word description) – (list of numbers in brackets) collection of different objects Extensional description Intentional description

Descriptions of a Set (2) – (Venn diagram) Diagram description A B

Operations on Sets (1) 3 operations are defined on sets: – – Union Intersection noted A B A B A B A B

Operations on Sets (2) – – Exercise : Give the extensional description of: noted Relative complement A B A B A B for A\B read: relative complement of B in A

EXERCISES

Exercise n° 3 p. 5

Exercise n° 4 p. 5

Exercise n° 5 p Name sets 2- Define intersection 3- Define relative complement 4- Define the rest (if any) Choir Band 8 Class

Exercise n° 6 p Name sets 2- Define intersection 3- Define relative complement 4- Define the rest (if any) Band Sport 95 School

Exercise n° 7 p Name sets 2- Define intersection 3- Define relative complement 4- Define the rest (if any) Dogs Cats 5 Clients Fish

Homework for next lesson Exercises 6 and 7 p. 6

By the end of this course You are able to: – Know 3 ways of describing a set – Know the operations on sets – Perform the operations on sets

THANK YOU FOR YOUR ATTENTION See you next Thursday, please learn your lesson !