Partial Differentiation Identity Problem

In summary, the conversation discusses how to show that a relation of the form ƒ(x,y,z) = 0 implies the relation (∂x/∂y)_z (∂y/∂z)_x (∂z/∂x)_y = -1. The conversation also mentions using the equations f(x,y) and df = (∂f/∂x)_y dx + (∂f/∂y)_x dy to find dx, dy, and dz and then eliminating them to find an expression with only partial derivatives. It is also suggested to verify the equality of (partial x/partial y)_z * (partial y/ partial x)_z = 1.
  • #1
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Homework Statement


Show that a relation of the kind ƒ(x,y,z) = 0
then implies the relation
(∂x/∂y)_z (∂y/∂z)_x (∂z/∂x)_y = -1


Homework Equations



f(x,y)

df = (∂f/∂x)_y dx + (∂f/∂y)_x dy



The Attempt at a Solution



I expressed x = x(y,z) and y = y(x,z) then found dx and dy, also tried z = z(x,y) and found dz.

not sure where to go from here.

Thanks in advance
 
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  • #2
After finding dx, dy, and dz as you described, try eliminating dx, dy and dz to find an expression that has only partial derivatives. You should be able to prove this.

Also do you know what is (partial x/partial y)_z * (partial y/ partial x)_z ? Can you verify this is equal to 1?
 

Related to Partial Differentiation Identity Problem

1. What is partial differentiation identity problem?

The partial differentiation identity problem is a mathematical concept that involves finding the derivative of a function with respect to a specific variable while holding all other variables constant. It is often used in multivariable calculus to analyze how a function changes as one variable changes, while keeping all other variables fixed.

2. Why is partial differentiation identity problem important?

Partial differentiation is important because it allows us to analyze the behavior of a function in multiple dimensions. It is used in various fields of science and engineering, such as physics, economics, and engineering, to model and study complex systems.

3. What is the difference between partial differentiation and ordinary differentiation?

The main difference between partial differentiation and ordinary differentiation is that partial differentiation involves finding the derivative of a function with respect to a specific variable, while holding all other variables constant. Ordinary differentiation, on the other hand, involves finding the derivative of a function with respect to a single variable.

4. How do you solve a partial differentiation identity problem?

To solve a partial differentiation identity problem, you need to first identify the function and the variable that you want to differentiate with respect to. Then, you can use the rules of partial differentiation, such as the chain rule and product rule, to find the derivative. Finally, you can substitute the values of the variables into the derivative to get the final result.

5. What are some applications of partial differentiation identity problem?

Partial differentiation is used in many areas of science and engineering, including physics, economics, and engineering. Some specific applications include optimization problems, where the goal is to find the maximum or minimum value of a function, and the study of rates of change in multivariable systems.

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