You are Here: Home >< Maths

# basic maths :S watch

1. (Original post by Skaterkid)

Here's the first step:
2. (Original post by Bakes0011)
Here's the first step:
X
3. x(2x^-1/4))^4=x(2^4)(1/x^(1/4 x4))
=x(16)(1/x)

look again, Skaterkid - i should have put x^-1/4, as it now is above.

if you do the bracket first, what`s inside it is: 16/(x^1/4)^4 because the exponent of x is negative, and: 1/a=a^-1, so, 1/a^(1/4)=a^(-1/4)
4. still dont understand how the answer is 16 or 2 to the power 4
5. (Original post by Skaterkid)

x(16x^-1)

16x / x = 16.
6. okay forgot the x in the question for now, put it in later.
when you're doing its basically like doing and multiply that by x.
7. (Original post by Skaterkid)
X
No, you got the bit right, but it's , which is the same as .

{mod: full solution removed}
8. What was the original question??????
9. You call that basic!?
You call that basic!?
exactly what I was thinking hahaha! I can't deal with maths.... :///
11. (Original post by Skaterkid)

Is that from an edexcel C1 past paper? Because I'm pretty sure that was the first question of my C1 exam.
You call that basic!?
Assuming the question is asking you to simplify the expression, it can be done with two pieces of info you learn at GCSE level about the rules of indices and essentially 2-3 'moves' raising to powers.
13. (Original post by MissBrown)
Assuming the question is asking you to simplify the expression, it can be done with two pieces of info you learn at GCSE level about the rules of indices and essentially 2-3 'moves' raising to powers.
errr excuse me? that makes no sense!
errr excuse me? that makes no sense!
It makes no sense to you for one of the following reasons:

(i) You have not yet been exposed to higher mathematics at GCSE
(ii) You didnt understand or learn it when taught

Either way, Im not quite sure why you would post in a mathematics forum that goes through to University level with a comment such as "you call that basic"
For many it will be very basic which I feel you may need to appreciate when posting in such fora.
errr excuse me? that makes no sense!
Read up on how to work with indices (Any GCSE text will do - it starts toward the top range of Foundation, but some is also in Higher Tier as well) It is quite simple once you have done it a couple of times
16. (Original post by MissBrown)
Either way, Im not quite sure why you would post in a mathematics forum that goes through to University level with a comment such as "you call that basic"
For many it will be very basic which I feel you may need to appreciate when posting in such fora.
because i can!
17. (Original post by lubus)
x(16x^-1)

16x / x = 16.
This. Please explain it though how you got to this so OP understands
because i can!
I think I shall leave it there
19. (Original post by MissBrown)
I think I shall leave it there
cheers for that!

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: September 30, 2011
Today on TSR

### University open days

• Southampton Solent University
Sun, 18 Nov '18
Wed, 21 Nov '18
• Buckinghamshire New University
Wed, 21 Nov '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