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# C2 differentiation watch

1. what is
y=2/x differentiated
and y=1/2x differentiated

is y=2/x -2x^-2
and y=1/2x -.5x^-2

are those right?
2. The first one is 2(1/x) and the second is 1/2(1/x) so if you know the derivative of (1/x) then you can just put the constant in front of the derivative to get the answer. Also,

What's the derivative or ?

3. what is this expession simplified
Attached Images

4. but the first one,
2/x can be written as 2x^-1
which differentiates to -2x^-2 right?
5. Um, they're both right as far as I can see...

Yeah they're fine. The other people may be thinking of integration, where 1/x becomes lnx
6. Sorry - I got confused by your first post.

I thought y=2/x -2x^-2 was your answer but I see now that the '-' was not meant to represent a minus.

7. the first is right...the second i think is wrong...it should be -0.5x^2 or -2x^-2

(Original post by maxfire)
Um, they're both right as far as I can see...

Yeah they're fine. The other people may be thinking of integration, where 1/x becomes lnx
i don't approve of this sig either (if it was you that had the lazytown gif)
8. (Original post by notnek)
Sorry - I got confused by your first post.

I thought y=2/x -2x^-2 was your answer but I see now that the '-' was not meant to represent a minus.

the '-' does represent a minus
9. (Original post by someperson)
the first is right...the second i think is wrong...it should be -0.5x^2 or -2x^-2

i don't approve of this sig either (if it was you that had the lazytown gif)
My pedobear sig got removed
10. (Original post by uxa595)
what is this expession simplified
1/x + 1

ask if you need to know how
11. (Original post by someperson)
the '-' does represent a minus
Sorry - I knew that.

What I meant to say was that I thought (y=2/x -2x^-2) was the whole answer.
12. (Original post by notnek)
Sorry - I knew that.

What I meant to say was that I thought (y=2/x -2x^-2) was the whole answer.
oh ok

(Original post by maxfire)
My pedobear sig got removed

but pikachu doesn't drink
13. (Original post by someperson)
oh ok

but pikachu doesn't drink
Sure he does. Just not on screen obviously. What do you think that'd do for his career?
14. (Original post by maxfire)
Sure he does. Just not on screen obviously. What do you think that'd do for his career?
you're wrong...he's innocent
15. (Original post by someperson)
you're wrong...he's innocent
I used to want a pet pikachu when pokémon first came out.

Spoiler:
Show
I still do
Spoiler:
Show
I could teach him drinking games
16. im sure this is right for the 2nd Qi wrote
the Q then in dy form :

also how would i find x in this:
Attached Images

17. (Original post by uxa595)
im sure this is right for the 2nd Qi wrote
the Q then in dy form :
how did you get that?
18. (Original post by maxfire)
I used to want a pet pikachu when pokémon first came out.

Spoiler:
Show
I still do
Spoiler:
Show
I could teach him drinking games
i still want a pet pikachu

Spoiler:
Show
i hate you
19. (Original post by uxa595)
im sure this is right for the 2nd Qi wrote
the Q then in dy form :
That's right
also how would i find x in this:
Multiply everything by x

Solve from there..
20. (Original post by maxfire)
That's right

Multiply everything by x

Solve from there..
i'm too slow with latex

and i'm being dumb...but how do you get the first...i get -2 not -1/2

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