Sets and Venns

• Finite= a set with a finite number of elements
• Infinite= have an infnite number of elements
• n(A)= used to represent the number of elements in set A
• A={xIxeZ, -2<x<2} the set of all X such that X is an interger between -2 and 2 not including -2 and 2.

B C A is a A circle with B inside it

B (intersection) A is the overlap of B and A

AUB= both circles and the overlap

A intersection B=o  is 2 separate circles neither are highlighted