1.

Integration by partial fraction : int(x^(2)-1)/(x^(4)+x^(2)+1)dx=...

Answer»

`(1)/(2)LOG((x^(2)+x+1)/(x^(2)-x+1))+C`
`(1)/(2)log((x^(2)-x-1)/(x^(2)+x+1))+c`
`log((x^(2)-x+1)/(x^(2)+x+1))+c`
`(1)/(2)log((x^(2)-x+1)/(x^(2)+x+1))+c`

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