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Differentiation help

Hi I just wanted to know if i differentiate x= (y-1)/-2 does the -2 at the bottom be affected? Would dx/dy be - 1/2?
Thanks

Reply 1

TenOfThem

Original post by thequackingduck

Hi I just wanted to know if i differentiate x= (y-1)/-2 does the -2 at the bottom be affected? Would dx/dy be - 1/2?
Thanks

yes

Reply 2

thequackingduck

Cheers! There was me trying to differentiate the -2 too haha

Reply 3

thequackingduck

How would i rearrange x^2 lnx = y to get x as the subject
I'm just unsure on how to get rid of the ln

Reply 4

Tutorsos

Original post by thequackingduck

How would i rearrange x^2 lnx = y to get x as the subject
I'm just unsure on how to get rid of the ln

apply fallowing derivative formulas

d/dx (uv) = (u dv/dx ) + ( v du/dx )

d/dx x^n = n x^(n-1)

d/dx (ln x) = 1/x
:smile:

Reply 5

TenOfThem

Original post by thequackingduck

How would i rearrange x^2 lnx = y to get x as the subject
I'm just unsure on how to get rid of the ln

I do not think you can - are you sure that you need to

Reply 6

davros

Original post by thequackingduck

How would i rearrange x^2 lnx = y to get x as the subject
I'm just unsure on how to get rid of the ln

You can't get x as the subject of that!

Why do you think you need to?

Reply 7

thequackingduck

I guess I can't do that then haha no wonder it was hard lol

Reply 8

TenOfThem

Original post by thequackingduck

I guess I can't do that then haha no wonder it was hard lol

Why were you trying?

Reply 9

thequackingduck

How do i differentiate √9-y (all of it is square rooted) with the limits of 0 and 9
I can't believe that I'm stuck on this, I'm disappointed in myself. Thanks.

Reply 10

davros

Original post by thequackingduck

How do i differentiate √9-y (all of it is square rooted) with the limits of 0 and 9I can't believe that I'm stuck on this, I'm disappointed in myself. Thanks.