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Math Help - Partial derivative please help

  1. #1
    Junior Member
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    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.
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  2. #2
    Senior Member Peritus's Avatar
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    <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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