Integrating a Differential: Understanding the Steps in a Proof

In summary, the conversation discusses a step in a proof involving integration and how it leads to a specific expression. The equation used in the proof is also mentioned. The person asking the question is initially confused but after receiving an explanation, they are able to proceed with their work.
  • #1
fluidistic
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Homework Statement


There's a step I don't really understand in some "proof".
[itex]d \left ( \frac{\mu }{T} \right )=-\frac{3R du}{2u}-\frac{Rdv}{v}[/itex]. Now he integrates both sides to get [itex]\frac{\mu}{T}- \left ( \frac{\mu}{T} \right ) _0=-\frac{3R}{2} \ln \frac{u}{u_0}-R \ln \frac{v}{v_0}[/itex].
I don't understand how an integration leads to such an expression.

Homework Equations





The Attempt at a Solution

Clueless.
 
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  • #2
hi fluidistic! :smile:

this is standard …

if we integrate dx from xo to x1, we get x1 - xo

we then put x = x1, and it becomes ∫ dx = x - xo

they've done it for x = µ/T, dx = du/u, and dx = dv/v :wink:
 
  • #3
Thanks a lot. Crystal clear to me now. I can proceed further. :smile:
 

FAQ: Integrating a Differential: Understanding the Steps in a Proof

What is a differential?

A differential is a mathematical concept used to describe the instantaneous rate of change of a function. It is represented by the symbol "dx" and can be thought of as an infinitely small change in the independent variable.

What is integration?

Integration is the process of finding the original function given its rate of change. It is the inverse operation of differentiation and is represented by the symbol ∫.

Why is it important to integrate differentials?

Integrating differentials allows us to find the original function and understand its behavior over a given interval. It is used in various fields of science and engineering, such as physics, economics, and biology, to solve real-world problems.

What are the different methods of integrating a differential?

There are several methods for integrating a differential, including substitution, integration by parts, partial fractions, and trigonometric substitution. The method chosen depends on the complexity of the differential and the available tools for integration.

What are some applications of integrating differentials?

Integrating differentials has numerous applications in science and engineering. It is used to calculate areas and volumes, find the position and velocity of moving objects, and solve differential equations that model real-world phenomena. It is also used in fields such as economics to analyze supply and demand curves and in biology to model population growth.

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