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# Integration Watch

1. Could someone tell me how best to go about integrating 1/((x+1)((X^2)-1)) wrt x please? I have tried using partial fractions (a/(x+1) + b/(x+1)^2 + c/(x-1)) but the simultaneous equations produced were inconsistent.

Thanks!
2. multiply the whole thing through by (x+1)^2 (x-1) and you get

Now set x=1 and you get c,
x=-1 and you get b,
and finally x=0 and use the results for b and c that you just worked out and you should get a.
3. (Original post by notastampcollector)
Could someone tell me how best to go about integrating 1/((x+1)((X^2)-1)) wrt x please? I have tried using partial fractions (a/(x+1) + b/(x+1)^2 + c/(x-1)) but the simultaneous equations produced were inconsistent.

Thanks!
They shouldn't be inconsistent; what simultaneous equations did you get? Show us your working and we'll try and show you where you've gone wrong.
4. I've realised my mistake now. Thanks for your help!

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Updated: December 17, 2010
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