Partial derivative please help

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November 11th 2008, 07:53 PM
cowboys111

Partial derivative please help

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.
November 11th 2008, 11:56 PM
Peritus

$<br /> \frac{\partial }<br /> {{\partial x}}\frac{1}<br /> {2}\ln \left( {x^2 + y^2 + z^2 } \right) = \frac{x}<br /> {{x^2 + y^2 + z^2 }}$

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