Set
CBSE · Class 11 · Applied Mathematics
Quick revision notes for Set — CBSE Class 11 Applied Mathematics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Definition and Representation of Sets
- A set is a well-defined collection of distinct objects called elements or members
- Well-defined means we can clearly identify whether an object belongs to the set or not
- Elements are distinct - no repetition is allowed in a set
Types of Sets
- Empty Set (∅ or {}): Contains no elements, n(∅) = 0
- Singleton Set: Contains exactly one element
- Finite Set: Has definite number of elements that can be counted
Subsets and Set Relations
- A ⊆ B means every element of A is also in B
- A ⊂ B means A is a proper subset of B (A ⊆ B but A ≠ B)
- Every set is a subset of itself: A ⊆ A
Intervals as Subsets of Real Numbers
- Closed interval [a,b]: includes both endpoints a and b
- Open interval (a,b): excludes both endpoints a and b
- Semi-open intervals: [a,b) includes a, excludes b; (a,b] excludes a, includes b
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What are the important topics in Set for CBSE Class 11 Applied Mathematics?
Set covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Set — CBSE Class 11 Applied Mathematics?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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