Set of sets Video Lecture | Mathematics for IIT JAM, GATE, CSIR NET, UGC NET

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FAQs on Set of sets Video Lecture - Mathematics for IIT JAM, GATE, CSIR NET, UGC NET

1. What is a set in mathematics?
Ans. In mathematics, a set is a collection of distinct objects, considered as an entity itself. It is a well-defined collection of elements or members, which can be anything like numbers, letters, or even other sets.
2. How are sets represented?
Ans. Sets can be represented in different ways. The most common method is by listing the elements within curly braces, separating them with commas. For example, a set of even numbers can be represented as {2, 4, 6, 8, ...}. Another method is by using set-builder notation, where a condition is given to describe the elements of the set. For instance, {x | x is a positive integer} represents the set of all positive integers.
3. What is the cardinality of a set?
Ans. The cardinality of a set refers to the number of elements it contains. It is denoted by the symbol 'n' or by writing '|' before the set name. For example, if A = {1, 2, 3}, then the cardinality of set A is 3, which can be written as n(A) = 3 or |A| = 3.
4. What is the difference between a subset and a proper subset?
Ans. A subset is a set where all the elements of one set are also present in another set. In other words, if every element of set A is also an element of set B, then A is a subset of B. On the other hand, a proper subset is a subset where all the elements of one set are present in another set, but the second set contains additional elements that are not in the first set.
5. How are sets related to mathematical operations?
Ans. Sets are closely related to mathematical operations such as union, intersection, and complement. The union of two sets A and B is a set that contains all the elements present in either A or B. The intersection of two sets A and B is a set that contains only the elements common to both A and B. The complement of a set A with respect to a universal set U is a set that contains all the elements in U but not in A. These operations allow us to perform various calculations and comparisons involving sets.
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