You are Here: Home >< Maths

# C4 doubts Watch

1. I had a go at one C4 question paper today and and I came across this question no 6:

http://www.school-portal.co.uk/Group...urceId=3992062

Pls can you check if my working out is correct?
*integral sign* t(t+1) (-2t) dt (ON TOP OF *integral sign* I HAD 0 AND ON BOTTOM ROOT 2)
*integral sign* (-2t^3 -2t^2) dt
[-2t^4/ 4 - 2t^3/ 3 ]

Then subbing in 0 gave 0. so 0- ({6+4sqrt2}/ 3)

I am asking if my method is OK because the MS is doing something different , they are removing the - sign and when they do this they are swapping the limits around?
2. It would be great if you could use LaTeX to write out maths.
You need a positive area, because it's an area. The reason you swap the limits is:
, because it's a useful convention that works.
3. (Original post by laurawoods)
I had a go at one C4 question paper today and and I came across this question no 6:

http://www.school-portal.co.uk/Group...urceId=3992062

Pls can you check if my working out is correct?
*integral sign* t(t+1) (-2t) dt (ON TOP OF *integral sign* I HAD 0 AND ON BOTTOM ROOT 2)
*integral sign* (-2t^3 -2t^2) dt
[-2t^4/ 4 - 2t^3/ 3 ]

Then subbing in 0 gave 0. so 0- ({6+4sqrt2}/ 3)
[

0-((-6-4sqrt2)/3)=

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: May 13, 2013
Today on TSR

### Am I pregnant?

...or just paranoid?

### A robot wrote Harry Potter?

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• 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

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