Relations and Functions
Madhya Pradesh Board · Class 12 · Mathematics
Step-by-step guide to study Relations and Functions in Madhya Pradesh Board Class 12 Mathematics. Topics to cover, practice strategy, and time allocation.
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Learn the Theory
Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.
Practice Problems
Solve textbook exercises and additional practice questions. There are 119 questions available for this chapter.
Revise & Test
Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.
Spaced Revision
Revisit Relations and Functions after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.
What to Focus On
- A relation in A is a subset of A × A.
- Empty relation: R = ϕ.
- Universal relation: R = A × A.
- Equivalence classes are mutually disjoint.
- The union of all equivalence classes is the whole set.
- For 2 divides a-b on Z, [0] is the even integers and [1] is the odd integers.
- One-one means distinct inputs have distinct outputs.
- Many-one means different inputs may have the same output.
- Onto means every codomain element has a preimage.
Common Mistakes to Avoid
A relation from a set to itself must connect every element to every other element.
Empty relation and universal relation mean the same thing.
If a relation is symmetric, then it must also be transitive.
Memory Tips
Empty relation and universal relation
Reflexive, symmetric, transitive
Equivalence relation as partition
Relation on integers given by 2 divides a-b
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