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Homework Statement
How do i integrate:
[tex]\int\frac{1}{(x^2+1)^2}[/tex]
?
Homework Equations
The answer is:
[tex]\frac{1}{4}(\frac{-2x}{x^2-1}-log(x-1)+log(x+1))[/tex]
The Attempt at a Solution
I don't know which method to use.
Im sorry, the question is correct but the answer is:
1/2[x/(x^2+1)+arctan(x)]
here partial fractions won't work because i will still have a term with (x^2+1)^2 in the denominator