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Sets Practice Questions - DPP for JEE

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FAQs on Sets Practice Questions - DPP for JEE

1. What are sets in mathematics?
Ans. Sets in mathematics are collections of distinct objects, called elements, which can be anything from numbers to letters to even other sets. Sets are usually denoted by capital letters and the elements are enclosed in curly brackets. For example, if we have a set of natural numbers, it can be represented as {1, 2, 3, 4, ...}.
2. How are sets represented in JEE exam questions?
Ans. In JEE exam questions, sets are often represented using set-builder notation or roster form. Set-builder notation is a concise way of representing a set by describing the properties that its elements must satisfy. For example, the set of even numbers can be represented as {x | x is an integer and x is divisible by 2}. Roster form, on the other hand, is a simple list of all the elements in the set. For example, the set of prime numbers less than 10 can be represented as {2, 3, 5, 7}.
3. What is the cardinality of a set?
Ans. The cardinality of a set refers to the number of elements in the set. It is denoted by the symbol |A|, where A is the set. For example, if A = {1, 2, 3, 4}, then the cardinality of set A is |A| = 4. If a set has no elements, it is called an empty set or a null set, and its cardinality is 0.
4. How are sets related to Venn diagrams?
Ans. Venn diagrams are a visual representation of sets, often used to illustrate set relationships and operations. In a Venn diagram, sets are represented by circles or ellipses, with each circle representing a different set. The overlapping regions indicate the elements that are common to the sets. Venn diagrams are particularly useful for understanding concepts such as union, intersection, and complement of sets.
5. How are sets used in JEE exam questions?
Ans. Sets are used extensively in JEE exam questions, particularly in topics such as probability, permutations and combinations, and functions. Questions may involve finding the number of elements in a set, determining the intersection or union of sets, or solving problems using set operations. It is important to have a clear understanding of set theory and its applications to excel in JEE mathematics.
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