You are Here: Home >< Maths

# C3 January 2013 integration question Watch

1. On this question, shouldn't you do integration by parts? on the mark scheme it's as if they've completely forgot about how it's multiplied by x, am i missing something really simple here?
Attached Images

2. (Original post by lucyjane_x)
On this question, shouldn't you do integration by parts? on the mark scheme it's as if they've completely forgot about how it's multiplied by x, am i missing something really simple here?
No, they've done it by recognition. Use the substitution u = x^2 + 3 if you can't spot it.

The integral is of the form derivative of function * (function)^(a number) so integration to function^(number +1) / (number + 1)
3. (Original post by Zacken)
No, they've done it by recognition. Use the substitution u = x^2 + 3 if you can't spot it.

The integral is of the form derivative of function * (function)^(a number) so integration to function^(number +1) / (number + 1)
so you can't use parts?
4. (Original post by lucyjane_x)
so you can't use parts?
Not really, no. I suppose you could if you wanted to, but in a perverse, totally illogical and unrequisite way.

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: June 15, 2016
Today on TSR

### What is the latest you've left an assignment

And actually passed?

### Simply having a wonderful Christmas time...

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.