=\frac{-r\hat{r}}{r^{3}}
??
so it's the negative r unit vector pointing in the r direction.. over r cubed.. right? =(
I seem to have a huge knowledge hole about vectors
Does my solution look correct to you guys?
Homework Statement
Calculate:
\nabla \varphi (r)
If:
\varphi (r) = \frac{1}{4\pi\epsilon_{0}}\frac{1}{r}
with: r = \sqrt{x^{2}+y^{2}+z^{2}}
Homework Equations
n/a
The Attempt at a Solution
Thankyou very much. Yes, I was trying to find y' in terms of the other stuff. Previously, I had only learned the product rule for two variables.. like u'.v + u.v'.
hey there,
At the moment at school I'm doing Implicit Differentiation.
If i had for Instence 2y'yx + 6x = 0
how can I use the product rule on the first step when there are 3 variables?
Cheers-
Andy