Question

Define with examples 3)Universal set, 5)Empty set​

Answer 1

Answer:

A universal set is the set of all elements under consideration, denoted by capital U or sometimes capital E. Example: Given that U = {5, 6, 7, 8, 9, 10, 11, 12}, list the elements of the following sets. In Venn diagrams, the universal set is usually represented by a rectangle and labeled U.

The empty set (∅) has no members. This placeholder is equivalent to the role of “zero” in any number system. Examples of empty sets include: The set of real numbers x such that x2 + 5, The number of dogs sitting the PSAT.