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# Help with maths question watch

1. How do you do.. Number 20
2. (Original post by RiahDawson)
How do you do.. Number 20
Firstly do you know what to do when you have a minus sign in the exponent?
3. (Original post by gagafacea1)
Firstly do you know what to do when you have a minus sign in the exponent?
Well I know you usually it's

But having a fraction confuses me
4. (Original post by RiahDawson)
Well I know you usually it's

But having a fraction confuses me
Great! Now isn't the same as ? Meaning that to remove the minus sign, you turn the fraction upside down (ie turning it to its reciprocal). So if you do that to , it becomes ...?

Also remember that exponentiation (raising to a number) is distributive over multiplication, and therefore division. In other words, just like how you did part 19 by putting the 2 above the p and the q, you do the same for fractions, you put it above both numbers.
5. (Original post by gagafacea1)
Great! Now isn't the same as ? Meaning that to remove the minus sign, you turn the fraction upside down (ie turning it to its reciprocal). So if you do that to , it becomes ...?
Ooooh now I'm starting to understand thank you ^_^" I just thought the 1 magically appears outa nowhere cause I learnt it as a rule.
6. (Original post by RiahDawson)
Ooooh now I'm starting to understand thank you ^_^" I just thought the 1 magically appears outa nowhere cause I learnt it as a rule.
Yes exactly! And now you have . Which btw I edited my post above to give you an idea of how to do.
7. (Original post by gagafacea1)
Yes exactly! And now you have . Which btw I edited my post above to give you an idea of how to do.
Thank you so much
8. (Original post by gagafacea1)
...
The question was not by the way.
9. (Original post by notnek)
The question was not by the way.
woops. Thanks !

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