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Practice Exercise: Subsets | Sets and Functions - JEE PDF Download

-> Make correct statements by filling in the symbols ⊂ or ⊄ in the blank spaces :


1. {x : x is a student of Class XI of your school}. . .{x : x student of your school}


2. {x : x is an equilateral triangle in a plane} . . . {x : x is a triangle in the same plane}


3. {x : x is an even natural number} . . . {x : x is an integer}


4. φ . . . { 1, 3 }, where φ is an empty set.


-> Let A = { 1, 2, { 3, 4 }, 5 }. Which of the following statements are incorrect and why?

Note that φ is an empty set.

(i) {3, 4} ⊂ A 

(ii) {3, 4} ∈ A 

(iii) {{3, 4}} ⊂ A

(iv) 1 ∈ A 

(v) 1 ⊂ A 

(vi) {1, 2, 5} ⊂ A

(vii) {1, 2, 5} ∈ A 

(viii) {1, 2, 3} ⊂ A 

(ix) φ ∈ A

(x) φ ⊂ A 

(xi) {φ} ⊂ A

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FAQs on Practice Exercise: Subsets - Sets and Functions - JEE

1. What is the concept of subsets in JEE?
Ans. In JEE (Joint Entrance Examination), the concept of subsets refers to a set that contains elements of another set. It is a fundamental concept in mathematics and is extensively used in various topics of JEE, such as permutations, combinations, and probability.
2. How do subsets relate to the JEE exam?
Ans. Subsets are an important topic in the JEE exam as they form the basis of many concepts and problem-solving techniques. Questions related to subsets can be asked in various sections of the JEE exam, including mathematics and logic-based questions.
3. What are the properties of subsets in JEE?
Ans. Subsets in JEE have several properties that are essential to understand. Some of these properties include: - Every set is a subset of itself. - The empty set is a subset of every set. - If A is a subset of B and B is a subset of A, then A and B are equal sets. - If A is a subset of B and B is a subset of C, then A is a subset of C.
4. How can I determine the number of subsets of a set in JEE?
Ans. To determine the number of subsets of a set in JEE, we can use the concept of power set. The power set of a set with 'n' elements will have 2^n subsets. For example, if a set has 3 elements, its power set will have 2^3 = 8 subsets.
5. Can you provide an example of a JEE-level question involving subsets?
Ans. Sure! Here's an example of a JEE-level question involving subsets: Question: Let A = {1, 2, 3}. How many non-empty subsets of A have the property that the sum of their elements is an even number? Answer: The subsets that have the sum of their elements as an even number will have either all odd elements or all even elements. Since A has 3 elements, there are 2^3 = 8 subsets in total. Out of these, there are 2^2 - 1 = 3 subsets with all odd elements (excluding the empty set), and 2^1 - 1 = 1 subset with all even elements (excluding the empty set). Therefore, the total number of non-empty subsets of A with the sum of their elements as an even number is 3 + 1 = 4.
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