### Mathematics Class XI

Unit-I: Sets and Functions
Chapter 1: Sets
Unit-II: Algebra
Chapter 5: Binomial Theorem
Chapter 6: Sequence and Series
Unit-III: Coordinate Geometry
Chapter 1: Straight Lines
Chapter 2: Conic Sections
Unit-IV: Calculus
Unit-V: Mathematical Reasoning
Unit-VI: Statistics and Probability
Chapter 1: Statistics
Chapter 2: Probability

# Inverse Relation

The inverse of , written as , is a relation from to defined by .

It is obvious that is a subset of and is a subset of .

It is also clear that is a subset of and range of is a subset of .

Example:

Let

Taking , then

(i) The relation Fatherhood on is

(ii) The daughterhood relation on is

(iii) The sonhood relation on is

(iv) The brotherhood relation on is

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