1.

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

Answer»

`(1)/(SQRT(7))TAN^(-1)((4x+1)/(sqrt(7)))+c`
`(1)/(2sqrt(7))tan^(-1)((4x+1)/(sqrt(7)))+c`
`(1)/(2)tan^(-1)((4x+1)/(sqrt(7)))+c`
None of these

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