calc question =(

[MeanMeosh]

argh, its been like 3 semesters since i've done this and i can't find my calc book...

derivative of 2 / (x^2 + z^2) with respect to x:

(-4x) / (x^2 + z^2)^2

correct?

 

[MeanMeosh]

oh come on... its just a "yes or no" question.

 

[BruinEd03]

Originally posted by: MeanMeosh
oh come on... its just a "yes or no" question.

yes

-Ed

 

[arynn]

yep

 

[MeanMeosh]

ah goody, my 8 problems on emag homework so far are right then.

thx

 

[GiLtY]

Are we considering Z as a variable or constant? If Z is a variable then you need to use implicit differentiation.

 

[MeanMeosh]

Originally posted by: GiLtY
Are we considering Z as a variable or constant? If Z is a variable then you need to use implicit differentiation.

its a variable, but this is a partial derivative with respect to x, so i believe we can treat z like a constant

 

[GiLtY]

If you are considering Z as a constant in the context of the problem, then your answer is fine, but if Z changes throughout the problem, then Z^2 would become 2*Z*(dZ) if you differentiate it.