Partial derivatives of level curves

In summary, the conversation discusses level curves and their parametrization by t. It also introduces the function w(t) and its relationship to f(u(t), v(t)). The question asks to find the value of dw/dt. The conversation also mentions level sets and topographic maps, and the confusion surrounding the concept of being on a level curve.
  • #1
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Homework Statement


Let ##C## be a level curve of ##f## parametrized by t, so that C is given by ## x=u(t) ## and ##y = v(t)##
Let ##w(t) = g(f(u(t), v(t))) ##
Find the value of ##\frac{dw}{dt}##

Homework Equations


Level curves
Level sets
Topographic maps

The Attempt at a Solution


Is it true that the answer to a level curve question is always zero? My teacher went over this but I couldn't understand him.
 
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  • #2
What does it mean to be on a level curve? What value will f put out for any changes in t? How does the g or w function change corresponding to f's change.
 

1. What are partial derivatives of level curves?

Partial derivatives of level curves are a mathematical concept used in multivariable calculus to describe the rate of change of a function with respect to one of its variables while keeping all other variables constant. They are useful for understanding the behavior of a function in multiple dimensions.

2. How do you find the partial derivatives of level curves?

To find the partial derivatives of level curves, you first need to determine the function's level curves by setting the function equal to a constant. Then, you can find the partial derivatives by taking the derivative of the function with respect to each variable, treating the other variables as constants.

3. What is the importance of partial derivatives of level curves?

Partial derivatives of level curves are important for understanding the behavior of a function in multiple dimensions. They can help us find the direction of steepest ascent or descent, identify critical points, and determine the rate of change of a function in a particular direction.

4. Can you explain the concept of tangent planes in relation to partial derivatives of level curves?

Yes, the concept of tangent planes is closely related to partial derivatives of level curves. Just as a tangent line touches a curve at a single point, a tangent plane touches a surface at a single point. The partial derivatives of level curves can be used to find the slope of the tangent plane at a given point on a surface.

5. Are there any real-world applications of partial derivatives of level curves?

Yes, partial derivatives of level curves have many real-world applications. For example, they are used in economics to analyze supply and demand curves, in physics to study the motion of objects in multiple dimensions, and in engineering to optimize designs of objects with multiple variables. They are also used in machine learning and data analysis to understand the relationships between multiple variables.

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