Hi, im trying to find the partial dervative with respect to x of:
ln(sqrt(x^2+y^2+z^2)). Im really stuck, can someone please show me how you would work this out? Thank you.

2. $
\frac{\partial }
{{\partial x}}\frac{1}
{2}\ln \left( {x^2 + y^2 + z^2 } \right) = \frac{x}
{{x^2 + y^2 + z^2 }}$