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Sets — Revision Notes

CBSE · Class 11 · Mathematics

Sets revision notes for CBSE Class 11 Mathematics: 4 topics in quick points. Key terms: A set is a well, In roster form and A set with no element.

146 questions60 flashcards4 formulas & key relations5 concepts

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Key Topics to Revise

1

1. Basic Idea of a Set

  • A set is a well-defined collection of objects.
  • Objects, elements, and members of a set mean the same thing.
  • Sets are usually written using capital letters such as A, B, C, X, Y, Z.
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2. Representation of Sets

  • There are two main ways to represent sets: roster form and set-builder form.
  • In roster form, all elements are listed inside braces and separated by commas.
  • In set-builder form, the common property of all elements is written.
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3. Empty, Finite, and Infinite Sets

  • A set with no element is called the empty set, null set, or void set.
  • The empty set is denoted by φ or { }.
  • A set is finite if it is empty or has a definite number of elements.
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4. Equal Sets and Subsets

  • Two sets are equal if they have exactly the same elements.
  • A set is unchanged if elements are repeated in roster form.
  • A set A is a subset of B if every element of A is also an element of B.

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Full Notes

Key Concepts

A set is a wellIn roster formA set with no elementA finite set is emptyTwo sets are equal if they

Frequently Asked Questions

What are the important topics in Sets for CBSE Class 11 Mathematics?
Key topics in Sets include Basic Idea of a Set, Representation of Sets, Empty, Finite, and Infinite Sets, Equal Sets and Subsets. Study these first, then practise questions on each for Class 11 exams.
How should I revise Sets for Class 11 exams?
Learn the core ideas first, then work through the 146 practice questions on Sets. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All CBSE Class 11 Mathematics Revision Notes

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