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Example 15 - Chapter 1 Class 12 Relation and Functions
Last updated at April 16, 2024 by Teachoo
Chapter 1 Class 12 Relation and Functions
Concept wise
- Relations - Definition
- Empty and Universal Relation
- To prove relation reflexive, transitive, symmetric and equivalent
- Finding number of relations
- Function - Definition
- To prove one-one & onto (injective, surjective, bijective)
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Composite functions
- Composite functions and one-one onto
- Finding Inverse
- Inverse of function: Proof questions
- Binary Operations - Definition
- Whether binary commutative/associative or not
- Binary operations: Identity element
- Binary operations: Inverse
Transcript
Example 15 Let f : {2, 3, 4, 5} → {3, 4, 5, 9} and g : {3, 4, 5, 9} → {7, 11, 15} be functions defined as f (2) = 3, f (3) = 4, f (4) = f (5) = 5 and g (3) = g (4) = 7 and g (5) = g (9) = 11. Find gof. f: {2, 3, 4,5} → {3,4,5,9} f(2) = 3, f(3) = 4, f(4) = 4 & f(5) = 5 Drawing diagram g: {3,4,5,9} → {7,11,15} g(3) = 7,g(4) = 7 ,g(5) = 11 ,g(9) = 11 Drawing diagram
