Integral of 1/(x^6+1)

  • #1

Homework Statement



basically the title

Homework Equations





The Attempt at a Solution


so I tried writing it as a difference of squares and got (x^3+1+sqrt(2)*x^1.5)(x^3+1-sqrt(2)x^1.5)
and I attempted partial fractions and I don't know if I did anything wrong, but then I got stuck when it came time to solve for the variables in the partial fraction decomposition. I'm not lost on this problem so If anyone has any clue, please guide me in the right direction. Thanks!
 

Answers and Replies

  • #2
11
0
I am not good at integrations... but here is a answer kind of thing done in mathematica....
you can check your results with it...
Sorry, could not really help you.
 

Attachments

  • #3
statdad
Homework Helper
1,495
35
Try writing [itex] 1 + x^6 [/itex] as a sum of two cubes:
[tex]
1+x^6 = 1 + \left(x^2\right)^3
[/tex]

and factor, then apply partial fractions.
 
  • #4
21
1
Hint :: ##\displaystyle \int\frac{1}{1+x^6}dx = \frac{1}{2}\int\frac{(1+x^4)+(1-x^4)}{1+x^6}dx##

and Break into two parts ##I## and ##J##
 

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