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c) \( z=\ln \left(x-e^{x y}\right) \)

Ask by Collins Cross. in Cuba
Mar 18,2025

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Las derivadas parciales de la función \( z = \ln\left(x - e^{xy}\right) \) son: \[ \frac{\partial z}{\partial x} = \frac{1 - y\, e^{xy}}{x - e^{xy}}, \] \[ \frac{\partial z}{\partial y} = \frac{- x\, e^{xy}}{x - e^{xy}}. \]

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Beyond the Answer

This equation represents a surface in three-dimensional space where \( z \) is defined as the natural logarithm of the expression \( (x - e^{xy}) \). It's critical to note that for the logarithm to be defined, the argument must be positive, meaning \( x \) must be greater than \( e^{xy} \) for real values of \( z \). Graphing this function can be quite exciting, revealing fascinating behaviors as \( x \) and \( y \) are varied! When working with logarithmic functions like this, a common pitfall is overlooking the domain restrictions. Make sure to always check that the input to the logarithm stays positive, because if \( x \) and \( e^{xy} \) flip the order, you'll venture into the complex number territory. To solve for specific values, keep in mind to explore edge cases where \( x \) is close to \( e^{xy} \) to see how \( z \) behaves near its limits.

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