1.

Integration by partial fraction : int(dx)/(x^(2)+4x+13)=...

Answer»

`LOG(X^(2)+4x+13x)+C`
`(1)/(3)tan^(-1)((x+3)/(3))+c`
`log(2x+4)+c`
`(2x+4)/((x^(2)+4x+13)^(2))+c`

ANSWER :B


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