Relations and Functions
A railway timetable pairs each train with its departure time, which is a rule linking two sets. Chapter 2, Relations and Functions, of the NCERT Mathematics textbook for Class 11 studies such links precisely. You will form Cartesian products and draw arrow diagrams, test whether a relation is a function, read domain, codomain and range from graphs and formulae, and meet constant, identity, polynomial, rational, modulus, signum and greatest integer functions with their graphs.
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