a) \( z=\ln \left(\frac{x}{y}\right)+x y^{2} \)
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Extra Insights
Did you know that the natural logarithm, which appears in your function, was developed independently around the same time by John Napier and later formalized by mathematicians like Leonhard Euler? This mathematical tool is not only essential for calculus but also plays a significant role in various scientific fields, including physics and engineering, where exponential growth and decay processes are analyzed. When working with mixed functions like this one, it's crucial to differentiate clearly between the variables. A common mistake is to forget to apply the chain rule when differentiating composite functions. Always keep an eye out for implicit differentiation when variables are intertwined! This can save you from calculation errors and ensure you're on the right track when analyzing curves or surfaces defined by such complex equations.
