x Turn on thread page Beta
 You are Here: Home >< Maths

# C3 Differentiation (Edexcel) watch

1. Getting a bit deflated by this.......I can't even do the first question.......

1a) Differentiate

I'm not going to go through each step, but using the product rule (and the chain rule to an extent), I got:

Could anyone enlighten me as to where I've gone wrong?
2. You haven't gone wrong, you just haven't simplified (or, rather, factorised) it. Take out as a common factor.
3. (Original post by Introverted moron)
Getting a bit deflated by this.......I can't even do the first question.......

1a) Differentiate

I'm not going to go through each step, but using the product rule (and the chain rule to an extent), I got:

Could anyone enlighten me as to where I've gone wrong?
You're not wrong, you just need to go a step further and take out a common factor of (1+3x)^4 from each part of your expression and re-arrange the rest.

Edit: Too slow
4. Generally they like you to take out a common factor, in this case from your answer it would be (1+3x)^4.

EDIT: Even slower :P
5. (Original post by Introverted moron)
Getting a bit deflated by this.......I can't even do the first question.......

1a) Differentiate

I'm not going to go through each step, but using the product rule (and the chain rule to an extent), I got:

Could anyone enlighten me as to where I've gone wrong?
6. Ah, I see. Thank you all.

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: April 10, 2011
Today on TSR

Is it worth it?

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