Misc 11 - Let f = {(ab, a + b): a,b}. Is f a function - Functions - Defination

  1. Chapter 2 Class 11 Relations and Functions
  2. Serial order wise
Ask Download


Misc 11 Let f be the subset of Z × Z defined by f = {(ab, a + b): a, b ∈ Z}. Is f a function from Z to Z: justify your answer. f = {(ab, a + b): a, b ∈ Z} Also, both a & b are integers f will have elements (0,0) , (0,1) , (0,2) Here, first element 0 is repeating Hence, it does not have a unique(one) image. So, f is not a function

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
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.