Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
8104911739
For Business Enquiry

or

Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number

022-62211530

Mon to Sat - 11 AM to 8 PM

sir, if for a function f(x), and for another function g(y) , if I prove that gof(x) = x & fog(y)=y, should I have to prove that f is an onto function? Or if a question asks me to prove that f is an onto function , can I apply the above mentioned method? Please explain it.

Asked by shivendra upadhyay 13th March 2013, 11:40 AM
Answered by Expert
Answer:
If the question asks you to prove f is onto, then the proper procedure is to prove that for each b in set B, there exists atleast one a in A such that f(a) = b. Note that here, f is a function from A to B.
Answered by Expert 15th March 2013, 11:23 AM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Chat with us on WhatsApp