Let's define 5 sets as follows: A = {x,y, z} B = {p,q} C = {(x,p)} D = {x,p} E = {z} List the members of the following sets: (а) А х ВхЕ (b) (Ах В) — с (c) p(»(E)) |(d) |p(AUB) – D| Recall that p(A) is the power set of A and |A| denotes the number of elements (cardinality) of A.

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Q: Define Open set ?

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Q: If a set A has 63 proper subsets, what is |A|? *

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Set Theory

Every field in the present world involves a set. The theory of sets was developed by German mathematician Georg Cantor while working on the “problems of trigonometric series”.