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# Fractions

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Why bother with a post grad course - waste of time? 17-10-2016
1. Hi,

I have some queries.

There are some questions on the attachment below of which I am not too sure about.

For i)0
ii)9
iii) I'm not too sure

Help would be appreciated.
2. i) That's incorrect. Any number to the power of 0 is equal to 1.
ii) Correct.
iii) Use the index law:

3. (Original post by notnek)
i) That's incorrect. Any number to the power of 0 is equal to 1.
ii) Correct.
iii) Use the index law:

So would it be -6/4
4. (Original post by zed963)
So would it be -6/4
Two negatives make a plus (it should be +6/4 in the exponent).
Two negatives make a plus (it should be +6/4 in the exponent).
So whats 16^6/4
6. (Original post by zed963)
So whats 16^6/4
Remember,
7. (Original post by zed963)
So whats 16^6/4
16^(6/4)= 16^(3/2)
8. (Original post by raheem94)
Remember,
I don't understand what u mean here.
9. (Original post by zed963)
I don't understand what u mean here.
Raise both sides to the power of 6/4.
10. (Original post by zed963)
I don't understand what u mean here.
11. (Original post by raheem94)
I would like you to explain why you are doing the things.
12. would the answer be 18 by any chance?

I meant 2 to the power 6
13. (Original post by zed963)
I would like you to explain why you are doing the things.
We have got

Now we need to simplify it further, so we will notice that,

Hence,

Now use the rule,

Do you get it?
14. (Original post by zed963)
would the answer be 18 by any chance?
15. (Original post by zed963)
I would like you to explain why you are doing the things.
You seem to be struggling so I'll show you an alternative method that you may be more used to:

Raising a number to the power of is the same as square-rooting it (the 2 on the denominator tells you this) and then cubing it (from the numerator). So you get:

16. (Original post by notnek)
You seem to be struggling so I'll show you an alternative method that you may be more used to:

Raising a number to the power of is the same as squaring it (the 2 on the denominator tells you this) and then cubing it (from the numerator). So you get:

Its just that we've been taught using a different method.
17. (Original post by zed963)
Its just that we've been taught using a different method.
Do you understand the method I gave? Which method have you been taught?
18. (Original post by notnek)
Do you understand the method I gave? Which method have you been taught?
I've been taught that you have 4 boxes and all those 4 boxes multiplied by something that has to = 16 and now since its asking for 6 we would just multiply the number inside the box to the power of 6.

4 boxes come from the denominator of 6/4
19. (Original post by zed963)
I've been taught that you have 4 boxes and all those 4 boxes multiplied by something that has to = 16 and now since its asking for 6 we would just multiply the number inside the box to the power of 6.

4 boxes come from the denominator of 6/4
This seems very odd. Show your method and perhaps we can make sense of it.
20. (Original post by steve2005)
This seems very odd. Show your method and perhaps we can make sense of it.
I also can't understand what he is saying. But i also don't see any point for explaining things in this way, a GCSE student shouldn't have any problem doing these in the way it is done in this thread.

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