Integrating Rational Functions: Is It Possible?

In summary, the conversation discusses evaluating the integral of (x+1)/(x-1) and the possibility of finding a function g such that g'=f'/f. The conversation also touches on the importance of knowing basic algebra for integration and the suggestion to try solving the problem yourself.
  • #1
Oblivionator
6
0
Evaluate the integral:

int ((x+1)/(x-1)) dx

is this possible?

i tried searching for this but there was no answer
 
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  • #2
(x+1)/(x-1)=[(x-1)+2]/(x-1)=1+2/(x-1)

Have you ever seen a function g such that g'=f'/f
?
 
  • #3
(x+1)/(x-1)=[(x-1)+2]/(x-1)=1+2/(x-1)

could you please explain this?

im having problems integrating ((x+1)/(x-1)) dx
 
  • #4
no wait, could you please fully solve the problem?
 
  • #5
Oblivionator said:
(x+1)/(x-1)=[(x-1)+2]/(x-1)=1+2/(x-1)

could you please explain this?

im having problems integrating ((x+1)/(x-1)) dx
If you cannot do basic algebra you are going to have great difficulty integrating any function. The above is just simple division. And you can see it is true just by adding the fractions on the right hand side.

Oblivionator said:
no wait, could you please fully solve the problem?
It would be much better for you to try yourself. Do you know the anti-derivative of 1/x?
 
  • #6
no, not yet but thank you
 
  • #7
Then why in the world are you trying to do this problem?
 
  • #8
Sorry, I just like to read ahead in my textbook
 
  • #9
Good! Just don't be upset if you are often puzzled!:smile:
 

FAQ: Integrating Rational Functions: Is It Possible?

What is a rational function?

A rational function is a mathematical expression that can be written as the ratio of two polynomial functions. It is also known as a ratio of two polynomials or a fraction of polynomials.

What is the process of integrating a rational function?

The process of integrating a rational function involves finding the antiderivative of the function, also known as the integral. This can be done using various integration techniques such as substitution, integration by parts, or partial fractions.

How do you determine the limits of integration for a rational function?

The limits of integration for a rational function can be determined by looking at the domain of the function. The limits must be within the domain of the function in order for the integral to be valid. In some cases, the limits may also be given in the problem or can be determined by using symmetry.

What is the significance of rational function integration in real-life applications?

Rational function integration has many practical applications, such as in engineering, physics, and economics. It can be used to solve problems involving rates, volumes, areas, and other real-life scenarios.

What are some common challenges when integrating rational functions?

Some common challenges when integrating rational functions include determining the correct integration technique to use, dealing with complex or multi-variable functions, and finding the appropriate limits of integration. It is important to have a strong understanding of algebra and calculus concepts in order to effectively integrate rational functions.

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