
#1
Dec412, 12:01 PM

P: 15

1. The problem statement, all variables and given/known data
integrate dx / (x^2  1)^2 2. Relevant equations 3. The attempt at a solution There is nothing i can substitute to get rid of x. Except x=sqr(t), but then dx is 1/2sqr(t) so i get: ∫( dt / (t1)^2 * 2sqr(t) ) and it's still impossible to integrate. 



#2
Dec412, 12:04 PM

Sci Advisor
HW Helper
PF Gold
P: 12,016

Try partial fractions decomposition, remembering that (x^21)=(x+1)(x1)




#3
Dec412, 12:23 PM

HW Helper
Thanks
P: 4,664




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