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Math Help - Help with differentiating a ln.

  1. #1
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    Help with differentiating a ln.

    -\ln(2x^2+2y^2+1)

    Having a bit of trouble with this , need to find stationary points.

    Im not sure i'm differentiating it right.

     \frac{\partial}{\partial x} -\ln(2x^2+2y^2+1) = \frac{1}{(2x^2+2y^2+1)}\cdot \frac{\partial}{\partial x}(2x^2+2y^2+1)

    is that how i go about it?
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  2. #2
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    Quote Originally Posted by el123 View Post
    -\ln(2x^2+2y^2+1)

    Having a bit of trouble with this , need to find stationary points.

    Im not sure i'm differentiating it right.

     \frac{\partial}{\partial x} -\ln(2x^2+2y^2+1) = \frac{1}{(2x^2+2y^2+1)}\cdot \frac{\partial}{\partial x}(2x^2+2y^2+1)

    is that how i go about it?
    Yes, except you lost a negative .....
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  3. #3
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    ok gotcha.Thanks.
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