Rational functions are of the form

r(x) = f(x)/g(x).

Where f(x) and g(x) are polynomial functions .

 

Since g(x) is in the denominator,

Domain of r(x) is where g(x)≠ 0

 

For example

If r(x) = 1/x

then, Domain of r(x) is all real numbers except 0

So, r(x) is defined from R – {0} –> R

 

Let us discuss r(x) = 1/x in the next question

  1. Chapter 2 Class 11 Relations and Functions
  2. Concept wise
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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.