You are Here: Home >< Maths

# C3 Range?!? watch

Announcements
1. I realllllly don't understand how you work out the range of a function, i would reallly appreciate it if anyone could explain it for me simply please!

eg. state the range of g(x) = 2x^2 - 3

thanks!!
2. okay, the range is the possible values of y for those in the domain (which tells you the values of x). The best way is to find the values of the minimum/maximum. Then the range is all the values of above/below/between the points depending what's what.

Hope that helps
3. OK, do you know what:

The shape of the graph is?
The lowest/highest possible value of g(x) is?
4. The graph is a positive x^2 curve, and thats all I'm saying. You should be able to sketch graphs and find lowest points by C3

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 2, 2010
Today on TSR

### Uni league tables

Do they actually matter?

### University open days

• University of Warwick
Sat, 20 Oct '18
• University of Sheffield
Sat, 20 Oct '18
• Edge Hill University
Faculty of Health and Social Care Undergraduate
Sat, 20 Oct '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams