Turn on thread page Beta

What's a quick and easy way to determine domain/range? watch

    • Thread Starter

    I know the principle of the two terms but I often get confused when I am asked to find the domain or range of complex looking equations like x+2/x which would be a nightmare to try and plot. What's an easy way to find the domain and range for functions that look confusing?

    Domain is usually (though not always) all the real numbers minus any which will give non-real/infinite answers. In that example, for instance, the domain is all real numbers except 0. The range is trickier: you could try trying to find an inverse, and find domain of that. That's what I'd probably do for the example.
Submit reply
Turn on thread page Beta
Updated: January 18, 2010
The home of Results and Clearing


people online now


students helped last year

University open days

  1. Sheffield Hallam University
    City Campus Undergraduate
    Tue, 21 Aug '18
  2. Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 22 Aug '18
  3. University of Buckingham
    Postgraduate Open Evening Postgraduate
    Thu, 23 Aug '18
A-level students - how do you feel about your results?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.