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how to differentiate 5/x watch

2. y= 5/x

y= 5x^-1

Then differentiate that
3. (Original post by penelopecrux)
If we know this rule

What is another way can be written as?
4. (Original post by econwarwicker)
x
Posting full solutions are against forum rules
5. (Original post by econwarwicker)
y= 5/x

y= 5x^-1

dy/dx= -5x^-2

but wouldn't 5x^-1 be 1/5x?
6. (Original post by KaylaB)
Posting full solutions are against forum rules
oh wow really I'll edit it
7. (Original post by penelopecrux)
but wouldn't 5x^-1 be 1/5x?
No. And be careful not to write ambiguous expressions.
8. (Original post by econwarwicker)
oh wow really I'll edit it
That'd be ace thanks, it's just so people are actually learning as opposed to just copying answers
9. (Original post by penelopecrux)
but wouldn't 5x^-1 be 1/5x?
Would it help if we first think of as ?
10. (Original post by KaylaB)
That'd be ace thanks, it's just so people are actually learning as opposed to just copying answers
Yes I get that. But if they wanted the answer for a question they can easily get that from a mark scheme. Having solutions with the final answer and showing how to get to the final step is what helps, not just a small tip. For simple ones like this then yeah thats fine.
11. (Original post by penelopecrux)
but wouldn't 5x^-1 be 1/5x?
The negative power is only applied to the so = or

If you wanted it to be then it'd need to be as this then applies the power to everything inside the bracket, as opposed to just the x.
12. (Original post by econwarwicker)
Yes I get that. But if they wanted the answer for a question they can easily get that from a mark scheme. Having solutions with the final answer and showing how to get to the final step is what helps, not just a small tip. For simple ones like this then yeah thats fine.
do u do economics at warwick
13. (Original post by KaylaB)
Would it help if we first think of as ?

yes it does help, thank you!
say if i wanted to multiply x^8 by 6x^5, would it be 6x^13
14. (Original post by penelopecrux)
yes it does help, thank you!
say if i wanted to multiply x^8 by 6x^5, would it be 6x^13
No problem!

& yes that's correct
15. (Original post by penelopecrux)
say if i wanted to multiply x^8 by 6x^5, would it be 6x^13
Yes.
16. after a lot of practice you will get it. Also, there are like `rules´which will help you learn how to calculate these
17. (Original post by penelopecrux)
do u do economics at warwick
no but im going to do it

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