- #1
Krappy
- 16
- 0
Homework Statement
Calculate:
[tex]\integral \frac{1}{(x^2+1)(x+1)}[/tex]
Homework Equations
[tex]\integral f(x) g'(x) = f(x) g(x) - \integral f'(x) g(x) + C[/tex]
The Attempt at a Solution
I've tried using both [tex]1/(x+1)[/tex] and [tex]1/(x^2 + 1)[/tex] as [tex]dv[/tex], but both end up in another integral I can't solve, one with [tex]-ln(x+1) 2x / (x^2+1)^2[/tex] and the other with [tex]-atan(x)/(x+1)^2[/tex].
I think that probably this can only be solved with the method for rational functions (with all the coefficients), but I'm not sure.