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| Introduction |
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| In our daily life, we come across many relations such as father-son, brother-sister, teacher-student and many more. |
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| In mathematics too, we come across relations such as |
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 A is a subset of B |
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 line l is parallel to line m |
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 number m is less than number n. |
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| In all these, we notice that a relation involves pairs of objects in certain order. This chapter deals with the study of relations and functions in mathematics. |
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