Integrate: \frac{2x+1}{x^2+1} - Solutions

  • Thread starter Thread starter tunabeast
  • Start date Start date
  • Tags Tags
    Integration
Click For Summary
SUMMARY

The discussion focuses on computing the antiderivative of the function \(\frac{2x+1}{x^2+1}\). The correct approach involves splitting the fraction into two parts: \(\frac{2x}{x^2+1}\) and \(\frac{1}{x^2+1}\). The first part can be solved using substitution, while the second part relates to the arctangent function. This method effectively simplifies the integration process and leads to the correct solution.

PREREQUISITES
  • Understanding of basic calculus concepts, specifically antiderivatives.
  • Familiarity with substitution methods in integration.
  • Knowledge of trigonometric functions, particularly the arctangent function.
  • Ability to manipulate algebraic fractions in calculus.
NEXT STEPS
  • Study integration techniques involving substitution in calculus.
  • Learn about the properties and applications of the arctangent function in integration.
  • Practice splitting complex fractions for easier integration.
  • Explore advanced integration methods, such as integration by parts.
USEFUL FOR

Students studying calculus, particularly those focusing on integration techniques, as well as educators looking for examples of antiderivative problems.

tunabeast
Messages
26
Reaction score
0

Homework Statement


Compute the following antiderivative [tex]\int \frac {(2x+1)}{ (x^2+1)} d \ x[/tex]

Homework Equations


The Attempt at a Solution


I tried a method using using substitution of u = x^2+1, but i think this is approaching the question in the complete wrong way. I think maybe some kind of trigonometric function comes into it but I'm not sure which. Thanks in advance for any assistance
 
Physics news on Phys.org
tunabeast said:
I tried a method using using substitution of u = x^2+1, but i think this is approaching the question in the complete wrong way. I think maybe some kind of trigonometric function comes into it but I'm not sure which.

Both are needed, but only after you split the fraction

[tex]\frac {(2x+1)}{ (x^2+1)}[/tex] as [tex]\frac {2x}{ (x^2+1)} + \frac {1}{ (x^2+1)}[/tex]
 

Similar threads

  • · Replies 105 ·
4
Replies
105
Views
11K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 22 ·
Replies
22
Views
3K
Replies
7
Views
2K
  • · Replies 15 ·
Replies
15
Views
2K
  • · Replies 21 ·
Replies
21
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K
Replies
3
Views
2K
  • · Replies 19 ·
Replies
19
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K