In mathematics, if a pattern occurs, we can go on to ask, Why does it occur? What does it signify? And we can find answers to these questions. In fact, for every pattern that appears, a mathematician feels he ought to know why it appears.
~W. W. Sawyer
  Featured module
Class XII
Chapter  1 
Relations And Functions
The mathguru teacher explains why the modulus function is neither one-one nor onto with help of its graph. Along the way, the solution of this problem will explain the meanings of the many terms used in the context of functions.
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Mathguru, India’s first 24x7 guru of math, portal and online maths tutoring help with audio visual tutoring services to help maths students of Class VI to Class XII get extra marks in Mathematics. Get online lessons for maths problems and questions from NCERT books by math expert teachers and get 100/100 in Mathematics exam.