You are Here: Home >< Maths

# Range in function watch

1. Hi
Need help
State range of function
n (x)=x^2+5 for domain x>_(less than or equal to )2

I have drawn graph
4+5=9
So I think that range is between 5 and 9
n (x) is greater than 5 and less than or equal to 9

But it's answer is n ( x ) greater or equal to 9

Can some one explain me
2. (Original post by Qer)
Hi
Need help
State range of function
n (x)=x^2+5 for domain x>_(less than or equal to )2

I have drawn graph
4+5=9
So I think that range is between 5 and 9
n (x) is greater than 5 and less than or equal to 9

But it's answer is n ( x ) greater or equal to 9

Can some one explain me
That's because you are, for some reason, thinking of when the question clearly states (and you've even use the symbol for it) that
3. (Original post by RDKGames)
That's because you are, for some reason, thinking of when the question clearly states (and you've even use the symbol for it) that
OK
You are right
But I'm still confused about it
As I'm thinking
Starting point of graph is 5 and ending point is 9 so how ito can be greater than 9

4. (Original post by Qer)
OK
You are right
But I'm still confused about it
As I'm thinking
Starting point of graph is 5 and ending point is 9 so how ito can be greater than 9

Why do you think it ends at 9?
5. (Original post by RDKGames)
Why do you think it ends at 9?
OK got it😆
( I am trying to relate with other question but that was different from this
I undersood now as at 2 y value is 9 and at 3 y will be 12 so it is increasing after 9
That's why range is greater than 9

Thanks by the way

### Related university courses

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: July 15, 2017
Today on TSR

### Edexcel C4 Maths Unofficial Markscheme

Find out how you've done here

### 3,242

students online now

Exam discussions

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